Aluminum pot and new double-bottom process thereof

Abstract

The invention discloses an aluminum pot and a new double-bottom process thereof. The aluminum pot comprises an aluminum alloy pot body and double-bottom pieces. The double-bottom piece is provided with a plurality of small holes. Aluminum foil is arranged above the double-bottom piece with holes. The double-bottom piece without holes is arranged above the aluminum foil. The lower portion of the pot body and the double-bottom piece with holes are press-riveted into a whole through a hydraulic machine. The aluminum foil, the double-bottom piece without holes and the pot body are brazed into a whole at high temperature through a high-frequency brazing machine. The small holes can be in any shape. The main component of the double-bottom piece with holes and the double-bottom piece without holes is iron. The melting point of iron is higher than that of aluminum. Pressure welding is adopted for the first layer so that the bottom of the aluminum pot can not be damaged, the double-bottom pieceon the last layer is provided with no holes and is subjected to wiredrawing processing, the whole aluminum pot brazed at high temperature is extremely strong in adhesive force, simple in structure and convenient to produce, production cost can be greatly reduced, and the competitiveness of the product is effectively improved.

Description

Technical field: [0001] The invention relates to an aluminum pot and its new composite bottom technology Background technique [0002] At present, most of the aluminum pots that can be used in induction cookers and gas stoves are mechanically riveted double-bottomed pots that are mechanically extruded from the stainless iron base and the pot body. There are riveted through holes on the iron base plate, and the actual effective area of ​​the metal part that generates eddy current at the bottom is small, so there are defects such as low thermal efficiency and poor connection strength; the stainless iron base plate is uneven, which not only affects the appearance, but also affects the surface of the induction cooker. can also cause damage. There is also a process that blind holes are opened on the stainless iron compound negative, and the pot body and the compound negative are fused together during die-casting. Because it relies on the convex column formed by the aluminum liq...

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Problems solved by technology

Because it relies on the convex column formed by the aluminum liquid filled in the blind hole to connect the compound bottom and the pot body together, if the compound bottom is thinner, the depth of the blind hole is shallower, and the connection strength between the compound bottom and the pot body low; if the composite film is thicker, there is undoubtedly the disadvantage of high production costs

In addition, the connection between the double bottom plate and the pot body of the double bottom pot mainly depends on the convex column formed in the blind hole. Due to the different thermal expansion coefficients of aluminum alloy and stainless steel, the double bottom pot is resistant to heat and cold under the alternating action of cold and heat. The thermal fatigue performance is low, which will undoubtedly affect its service life; moreover, its composite negative is flat, and the positioning reliability of the composite negative is poor after being placed in the die-casting mold, and its waste rate is high; there is also a friction pressure welding, which is directly The double plate is welded to the bottom of the aluminum pot body, but because the main component of the magnetic plate of the double bottom is iron, and the melting point of iron is much higher than that of aluminum, it is easy to deform the bottom of the pot with high temperature and pressure welding, resulting in the rate of defective products higher

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