Stitching type compression casting composite bottom boiler and manufacture technique thereof

Abstract

The invention relates to a fit-typed die-casting composite bottom pan, comprising an aluminium alloy pan body and a composite bottom sheet which is fit at the bottom of the pan body; the fit-typed die-casting composite bottom pan is characterized in that the pan is formed by the rolling and composing of a composite material sheet and a stainless steel sheet; the composite material sheet is provided with a plurality of circular concave troughs with internally inclined side wall; the bottom of the pan body is provided with a plurality of circular convex ribs which are embedded into the circular concave troughs; after being fit, the circular concave troughs and the circular convex ribs are rabbeted with each other; the composite material sheet is made of pure aluminium or aluminium alloy or material with the linear expansion coefficient approximate to the aluminium alloy. The invention also relates to a manufacture process used for the fit-typed die-casting composite bottom pan; the manufacture process of the invention is used for preparing the fit-typed die-casting composite bottom pan by the steps as follows: composite bottom sheet preparing, die casting of aluminium alloy pan body, flap edge removing of the pan body, gold processing, fitting, surface disposing, etc. The fit-typed die-casting composite bottom pan has the advantages of firm connection of the composite bottom sheet, high thermal efficiency, good heat-resistance fatigue performance, simple manufacture process, and the like, and is a cooker which is especially suitable for being used for induction cookers.

Description

technical field [0001] The invention relates to a press-fit type die-casting double-bottom pot and its manufacturing process. Background technique [0002] At present, most of the double-bottomed pots that can be used in induction cookers are mechanically riveted double-bottomed pots. Because the bottom of the pot body of this kind of double-bottomed pot is riveted with the stainless iron double bottom plate through rivets, and there are riveting through holes on the stainless iron double bottom plate, When in use, the actual effective area of ​​the metal part that generates eddy current at the bottom is small, so the thermal efficiency is low, and there are defects such as complex manufacturing of molds and parts, and poor connection strength; If it is not smooth enough, it will not only affect the appearance, but also easily cause damage to the surface of the induction cooker. Contents of the invention [0003] In view of the above problems, the purpose of the present i...

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Problems solved by technology

[0002] At present, most of the double-bottomed pots that can be used in induction cookers are mechanically riveted double-bottomed pots. Because the bottom of the pot body of this kind of double-bottomed pot is riveted with the stainless iron double bottom plate through rivets, and there are riveting through holes on the stainless iron double bottom plate, When

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