The third generation conical flange rib and raceway processing method
A processing method and raceway technology, which is applied in the field of third-generation conical flange rib and raceway processing, can solve the problems of large outer diameter of conical flange, large blank deformation, and inability to grind the rib, so as to avoid Excessive deformation, avoid uncontrollable deformation, and ensure the effect of processing efficiency
Active Publication Date: 2019-07-23
浙江丰波机电科技有限公司
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Problems solved by technology
[0003] The present invention provides a third-generation conical flange rib and raceway processing method, which mainly solves the problem in the prior art that the temperature in the heat treatment process is directly increased when processing the flange of the automobile wheel hub unit. , which leads to excessive deformation of the blank, which makes the accuracy of subsequent forging poor, and because the third-generation conical flange has a large outer diameter, the general rib grinder is specially designed for grinding small inner rings, and the stroke is small, so it cannot grind the flange. The ribs require secondary clamping for grinding, resulting in low processing efficiency and other technical problems
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Embodiment
[0029] Embodiment: the third generation conical flange rib and raceway processing method of this example, its steps are:
[0030] a. The bearing steel bar is used as the raw material for preparation, the quality of the required raw material is calculated according to the shape of the flange, and then the bar is cut into sections by a sawing machine to form a blank;
[0031]b. Put the blank into an intermediate frequency induction heating furnace and heat it for heat treatment. The heat treatment is to raise the temperature to 820°C at a heating rate of 3°C / s, then drop the temperature to 720°C and keep it for 30 minutes; then raise the temperature to 930°C at a heating rate of 4°C / s, then lower the temperature to 840°C, and keep it warm for 30 minutes; finally, raise the temperature to 1000°C, with a heating rate of 4°C / s, heat treatment for 40 minutes, and then take out the furnace for descaling and sandblasting; Figure 5 , the intermediate frequency induction heating furn...
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The invention relates to an automobile hub flange, and particularly relates to a processing method for a third-generation conical flange edge and a raceway. The processing method aims to solve the technical problems existed in the prior art that when the flange of the automobile hub unit is processed, the temperature of the heat treatment process is rising directly, thereby making the deformationof a blank too large and the accuracy of subsequent forging lower; the outer diameter of the third generation conical flange is larger, and the flange edge fails to be ground by a flange edge grindingmachine, and a secondary clamping process for grinding is needed, thereby making the processing efficiency lower. The sawing and cutting process is carried out on a bearing steel bar, and then the heat treatment process is carried out on the bearing steel bar. The heat treatment process means that the temperature is firstly raised up to 800 to 850 DEG C, and the heating rate is 2 to 3 DEG C / s, and then the processes of cooling, closed-die forging, spraying, cooling, forging demoulding, residual temperature normalizing, low-temperature tempering, one-time grinding for the raceway and the flange edge, and processing for flange holes and grooves are carried out. Finally, the finished third generation conical flange is made.
Description
technical field [0001] The invention relates to an automobile hub flange, in particular to a third-generation conical flange rib and raceway processing method. Background technique [0002] Automobile hub bearings are important rolling bearings for automobiles. They are installed in automobile hubs, and their main function is to bear and provide precise guidance for the rotation of the hubs. It bears both axial load and radial load, and is a very important component. Automobile hub bearings have experienced the first generation of double row angular contact ball bearings, the second generation of double row angular contact ball bearing assemblies with flanges on the outer ring, and developed to the current third generation of double row with flanges on both the inner and outer rings. Angular contact ball bearing assemblies. A Chinese patent discloses a hub bearing unit (authorized announcement number: CN201671960U), which includes a flange, an inner ring, an outer ring, ba...
Claims
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IPC IPC(8): B23P15/00
Inventor 叶关明
Owner 浙江丰波机电科技有限公司