Ensuring the size and shape of the metal billet is crucial during the precision rolling process. Here are some key measures to ensure that the size and shape of the metal billet after precision rolling meet the requirements:
1、 Accurate control of rolling parameters
Rolling temperature:
Before precision rolling, it is necessary to ensure that the metal billet reaches the appropriate rolling temperature, which helps with the plastic deformation and dimensional control of the material. Low temperature can cause the material to become brittle and difficult to roll; Excessive temperature may cause material overheating and dimensional deviation.
It is necessary to accurately control the heating temperature and heating time according to the type of material and rolling process, to ensure uniform temperature inside the metal billet.
Rolling speed:
The selection of rolling speed should be matched with parameters such as rolling force and roll speed, as too fast or too slow speed may affect the rolling effect.
By adjusting the speed of the rolling mill and the feed rate of the metal billet, the deformation rate during the rolling process can be controlled, which in turn affects the size and shape of the product.
Rolling force:
The magnitude of rolling force directly affects the degree of deformation of metal billets. The appropriate rolling force should be selected based on the hardness and thickness of the material.
Use force sensors and feedback control systems to monitor and adjust rolling force in real-time, ensuring uniform and consistent material deformation.
2、 Optimize rolling passes and reduction amount
Rolling pass:
Determine a reasonable rolling pass based on the size and shape requirements of the product. Multi pass rolling can gradually reduce the size of metal billets and improve dimensional accuracy.
The rolling volume of each pass should be evenly distributed to avoid excessive dimensional deviations.
Compression amount:
The pressing amount of each pass needs to be precisely controlled. If it is too small, the rolling efficiency will be low, and if it is too large, it may cause uneven deformation or cracking of the material.
By conducting experiments and simulations, determine the optimal number of passes and pressure distribution to achieve efficient production and high-quality output.
3、 Adopting professional rolling technology and equipment
Precision rolling unit:
Choose high-precision and high rigidity precision rolling mills to ensure precise control of parameters such as roll clearance and speed.
The precision rolling mill unit needs to have good stability and reliability to reduce fluctuations and deviations in the production process.
Automated control system:
Adopting advanced automation control system to monitor and adjust the rolling process in real-time.
Through the control system, rolling parameters can be precisely controlled to improve the dimensional accuracy and shape stability of the product.
4、 Strengthen quality control during the rolling process
Surface quality inspection:
Using visual inspection and non-destructive testing techniques such as eddy current testing, infrared testing, etc., to perform surface quality testing on rolled metal billets.
Timely detect and address surface defects such as scratches, oxide scales, wrinkles, etc. to ensure the surface quality of the product.
Dimensional accuracy testing:
Use high-precision instruments such as thickness gauges, laser width gauges, and flatness detectors to measure the dimensional accuracy of rolled metal billets.
According to the test results, adjust the rolling parameters in a timely manner to ensure that the dimensional accuracy of the product meets the requirements.
5、 Other auxiliary measures
Descaling treatment:
Before rolling, the metal billet is subjected to descaling treatment to remove surface oxide scale and other substances.
This helps to improve the surface quality and dimensional accuracy after rolling.
Lubrication treatment:
Use appropriate lubricants during the rolling process to reduce friction between the rolling mill and the metal billet.
This helps to reduce rolling force, improve rolling efficiency, and also helps to protect the surface of the rolling mill and metal billet.
In summary, by accurately controlling rolling parameters, optimizing rolling passes and reduction, adopting advanced rolling technology and equipment, strengthening quality control during the rolling process, and taking other auxiliary measures, it is possible to effectively ensure that the size and shape of the metal billet meet the requirements during the precision rolling process.