Process technology of boiler for induction cooker

Abstract

The invention discloses a process technology of an aluminum pot for an induction cooker, mainly comprising the following steps: a casting process, a simple shaping process, a bottom surface processing process, a special shaping process, and the like, in the special shaping process, a shaping die is used for special shaping, the shaping die consists of an upper die and a lower die, the proximal edge of the upper die, which corresponds to ribs positioned at the bottom of the aluminum pot, is provided with salient points, and the shape of the lower die is similar to the inner surface of the aluminum pot; the aluminum pot is firstly placed between the upper die and the lower die during shaping, and then special equipment is adopted to extrude the ribs positioned on the inner bottom surface and the outer flat surface of the aluminum pot; aluminum molecular structures are changed at a punching position during punching due to the installation of the shaping upper die, thus the aluminum molecular structures are compacter and are enhanced in the cohesive degree; after the shaping, the adherence between a non-rust iron plate and aluminum contacted with the non-rust iron plate is enhanced, i.e. the non-rust iron plate is more tightly matched with the aluminum and better contacted and inosculated with the aluminum, and the non-rust iron plate can uniformly conduct heat to the aluminum in the heat conduction process.

Description

technical field [0001] The invention relates to a processing technology of a pot, in particular to a processing technology of an aluminum pot used in an electromagnetic cooker. Background technique [0002] Usually, the bottom of the aluminum pan used in the induction cooker is equipped with a stainless iron plate. This is because the magnetic conductivity of aluminum is not good, and the magnetic conductivity can be increased by arranging the stainless iron plate, so that the pan will be heated quickly. However, due to the different coefficients of thermal expansion of aluminum and stainless iron, the amount of deformation of aluminum and stainless iron is different when heated, which will cause the deformation of the pot body, and even the whole stainless iron plate will fall off from the bottom of the pot. [0003] For above-mentioned deficiency, the solution of existing product is: offer some hollow holes on a monolithic stainless iron plate, form the rib at the position...

AI Technical Summary

Problems solved by technology

This cold stamping processing method has the following disadvantages: firstly, the required equipment is relatively high, and the stamping machine usually needs to be more than 800-1000 tons; secondly, after the aluminum is deformed and squeezed into the turning hole of the steel plate , its edges must be rounded (such as Figure 1A As shown), there will be a gap a between the rounded corner and the turning hole of the steel plate, so water vapor will easily infiltrate from the gap, which will easily cause the steel plate to fall off; thirdly, the steel plate in the cold stamping method does not undergo another heat treatment, so When the steel plate is in use, it is easy to deform when exposed to high temperature, which makes the bottom of the pot uneven

However, this processing method still has the following disadvantages: 1. High-tonnage stamping equipment is also required; 2. When the riveted portion of the base plate is punched out with a flat die, the edges of the riveted portion will also form rounded corners (such as Figure 1B As shown), there will be a gap a between the rounded corner and the steel plate, so that water vapor can easily penetrate, so the problem of falling off will also occur; 3. Because in the first stamping, each hole of the steel plate is squeezed The amount of aluminum produced cannot be the same, so that the compactness (that is, the degree of cohesion) of each hole will be different, which will cause the degree of joint of the entire pot bottom to be different, and will also cause the steel plate to fall off

However, the aluminum liquid of the cooker completely wraps the steel plate in it, and only the flanging at the edge of the through hole of the steel plate is exposed on the outer surface of the chassis. During long-term use, due to the difference between the two materials, the coefficients of thermal expansion and contraction are different. It is easy to produce gaps between them, especially in aluminum b wrapped by steel plates and their flanges (such as Figure 1C As shown), since there are very few joints between the aluminum material b and the aluminum chassis, it is easy to warp and make the bottom of the pot uneven, which in turn affects the service life

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