Pressure cooker and manufacturing method thereof

Abstract

The invention discloses a pressure cooker. The body of the pressure cooker is a cold-rolled steel sheet. The manufacturing method of the pressure cooker is as follows: 1) preparing a cold-rolled steelsheet the thickness of which is 1.3-1.7mm; 2) punching the cold-rolled steel sheet into the body prototype of the pressure cooker by a punch; 3) using a spinning machine to spin the side wall of thepunched body prototype of the pressure cooker into the thickness of 0.6-0.9mm; 4) welding a steel sheet the thickness of which is 1.5-3.0mm on the outer bottom surface of the spun body of the pressurecooker; 5) performing QPQ nitrogen treatment on the whole body of the pressure cooker to form the finished product. The pressure cooker has simple structure, high heat transfer efficiency, high manufacturing efficiency and low cost, and is more safe and beneficial to body health. The pressure cooker combines the advantages of the present aluminum pressure cookers and the stainless steel pressurecookers but has no disadvantages of the two kinds of pressure cookers, so that the pressure cooker of the invention becomes a new pressure cooker and can replace the present aluminum pressure cookersand stainless steel pressure cookers.

Description

technical field [0001] The invention relates to an improvement scheme for a pressure cooker. Background technique [0002] At present, various pressure cookers used in the market can be divided into aluminum pressure cookers and stainless steel pressure cookers according to different materials. Aluminum pressure cookers have good heat transfer properties, but are not durable and have poor safety; The heat is not good, the price is high, and it is not conducive to widespread promotion. Contents of the invention [0003] One of the technical problems to be solved by the present invention is to provide a pressure cooker with high heat conduction efficiency, low cost and safety. [0004] This technical problem is solved by the following technical solutions: [0005] A pressure cooker, wherein the body of the pressure cooker is a cold-rolled steel plate. [0006] Another technical problem to be solved by the present invention is to provide a method for making a pressure cook...

AI Technical Summary

Problems solved by technology

[0002] At present, various pressure cookers used in the market can be divided into aluminum pressure cookers and stainless steel pressure cookers according to different materials. Aluminum pressure cookers have good heat transfer properties, but are not durable and have poor safety; The heat is not good and the price is high, which is not conducive to widespread promotion