Press-casting multi-bottom pan and press-casting forming manufacturing process

Abstract

The invention relates to a die-casting composite bottom pan, including an aluminum alloy pan body and a stainless iron composite bottom sheet. The invention is mainly characterized in that the stainless iron composite bottom sheet is provided with a plurality of clip pieces; the edge of the stainless iron composite bottom sheet is provided with a flange coating the lower peripheral of the pan body; the lower part of the aluminum alloy pan body and the stainless iron composite bottom sheet are cast into a whole body by a die-cast machine. The invention also relates to a die-cast manufacturing technique of the die-casting composite bottom pan. The manufacturing technique includes the following procedures: (1) the composite bottom sheet is manufactured: the stainless iron composite bottom sheet is stamped for forming and the clip piece is welded on the stainless iron composite bottom sheet; (2) the stainless iron composite bottom sheet is placed: the stainless iron composite bottom sheet is placed into a die mold setting cavity; (3) die casting: after matching the die, the die-cast machine fills the liquid aluminum alloy in the melting state with 600 to 700 DEG C temperature and 20 to 80MPa injection pressure ratio into the setting cavity at the injection speed of 20 to 60m / s, the filling time is 0.02 to 0.07s, and after the setting cavity is full of the aluminum liquid, the pan body and the stainless iron composite bottom sheet are cast into a whole body by the die-cast machine; (4) surface treatment: after the die-casting pan is cooled, flash edges of the pan body are removed, and then the pan body is sandblast and sprayed, thus manufacturing the die-casting composite bottom pan. The invention is a cook applicable to electromagnetic stove with the advantages of stable connection with the composite bottom sheet, high heat efficiency, good heat and fatigue resistance, simple manufacturing technique and high rate of finished products, etc.

Description

technical field [0001] The invention relates to a die-cast double-bottom pot and its die-casting 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 that use machinery to extrude the stainless iron base and the pot body. There are riveted through holes, and the actual effective area of ​​the metal part that generates eddy current at the bottom is small, so there are defects such as complex manufacturing of molds and parts, low thermal efficiency, and poor connection strength; the stainless steel base plate is uneven, which not only affects the appearance , but also cause damage to the surface of the induction cooker. Thereby, the Chinese utility model patent that notification number is CN201015535Y discloses a kind of die-casting double-bottom pan, and it is to have blind hole on the stainless iron double-bottom sheet, and pot body and double-bot...

AI Technical Summary

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 between the compound bottom and the pot body The strength is low; if the composite negative is thicker, there will undoubtedly be a 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

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