How to improve the electromagnetic induction heating aluminum shell heating uniformity

Optimized Induction Line Country Design

Coil Shape and Layout:The use of special coil shapes can improve the distribution of the magnetic field. For example, the use of spinning wires and reasonable adjustment of their spacing makes the distribution of the touch field on the surface and inside the aluminum shell more uniform. If a long aluminum shell is heated, the coil can be designed as a long and tightly surrounded structure to ensure that the magnetic field can be uniform along the length of the aluminum shell to cover.

Combination of multiple coils: Using multiple induction wire gardens to work together, by reasonably arranging the position, current size and direction of each wire garden, a more uniform magnetic field can be generated. For example, in the heating of large aluminum shell, in different parts of the aluminum shell set up a number of small line garden, each small line garden is responsible for heating a specific area, by adjusting the parameters of the individual coils, so that the heating effect of the various regions tend to be consistent.

Add magnetic core material:Add suitable magnetic core material, such as ferrite core, in the induction wire garden. The touch core can guide the direction of the magnetic field, so that the magnetic field is more concentrated. Centered and evenly distributed around the aluminum shell, thereby improving the uniformity of heating.

Adjustment of heating parameters

Frequency Adjustment:Adjust the frequency of electromagnetic induction heating appropriately. Lower frequency can make the magnetic field penetrate deeper, is conducive to large or thick-walled aluminum shell inside the uniform heating; and higher frequency is mainly in the aluminum shell surface to produce stronger eddy currents, suitable for thin-walled aluminum shell. For example, for aluminum shells with a wall thickness of 5-10mm, a frequency range of 10-20kHz may achieve better heating uniformity.

Power control: Precise control of the heating power. In the initial stage of heating, higher power can be used to quickly raise the overall temperature of the aluminum shell; when the temperature is close to the target 0 temperature, reduce the power, so that the heat can be fully conducted inside the aluminum shell to reduce the phenomenon of local overheating. Through this dynamic adjustment of power, can effectively improve the heating uniformity.

Improve the characteristics of aluminum shell itself

Surface treatment:The surface of the aluminum case is treated so that the surface roughness is uniform. This is because a surface with uneven roughness may result in uneven magnetic field distribution and D-flow generation. For example, the surface of the aluminum housing can be mechanically polished or chemically polished to achieve a relatively uniform finish, thus improving the uniformity of heating.

Shape design optimization:In the design phase of the aluminum shell, do your best to avoid complex geometric shapes and sharp edges. Complex shapes can lead to distortion of the magnetic field in these parts, which can produce uneven heating. If it is impossible to avoid complex shapes, special heating compensation measures can be taken in these parts that are prone to uneven heating, such as increasing the local magnetic field strength at the sharp edges and corners.

Adoption of auxiliary devices and technologies

Rotating mechanism:If the shape of the aluminum shell permits, a rotating mechanism can be installed to rotate the aluminum shell during the heating process. This allows all parts of the aluminum shell to be uniformly subjected to the magnetic field, thereby improving heating uniformity. For example, for some cylindrical aluminum shells, a rotating mechanism is installed inside the induction line garden so that the aluminum shell rotates around the base center axis at a uniform speed during the heating process.

Temperature feedback and control system:Install high precision temperature sensors to monitor the temperature of different parts of the aluminum shell in real time. The temperature data will be transmitted to the controller through the inverse system, and the controller will automatically adjust the heating parameters according to the temperature difference, such as adjusting the current and frequency of the induction line park, in order to ensure that the temperature of each part of the aluminum shell rises uniformly.