Views:3 Author:Site Editor Publish Time: 2020-06-03 Origin:Site
Today we take a look at the preforming and forming process of train wheel forging. Among them, the forming process of train wheel forgings is the key process for matching the rolling capacity of thermoforming units. A reasonable and scientific forming process must not only ensure that the pressure limit value of the press meets the preset process value, but also meets the rolling capacity requirements of the rolling mill in the next process.
The blanks of the hot wheels are cast using cylindrical steel billets with a diameter between 380mm-406mm. A high-speed sawing machine is used to cut the steel billet into sections. After the sectioned billets are heated, a manipulator grips and feeds them to the press to perform the preforming process. In the pre-forming process, the upper grinding tool uses a forming die, and the lower die uses a centrally protruding indentation die to achieve the metal volume distribution to the rim and hub.
The die forging process of the press uses static pressure forging, and the entire forging process is completed in one stroke. The excellent pre-forming technology for train wheels not only ensures the initial shape of the train wheels, but also plays a dual role in improving the internal structure of the train wheels and the metal flow lines. However, if the process at this stage is unreasonable, it will directly lead to defects such as eccentricity and incomplete filling of the train wheels. It will bring difficulties to the operation in the subsequent processing stage, and it will directly lead to the scrapping of the train wheels.