Metal rivet nut and machining process thereof

Abstract

The invention discloses a metal rivet nut and a machining process thereof. The metal rivet nut adopts an integrated structure, and comprises a nut head and a riveted pipe, wherein the nut head is positioned at the top end of the riveted pipe; the riveted pipe comprises a riveted pipe upper layer and a riveted pipe lower layer; an internal thread is tapped on the inner wall of the riveted pipe upper layer; and the pipe wall thickness of the riveted pipe lower layer is smaller than that of the riveted pipe upper layer. The machining process comprises the following steps: (1) cutting a metal pipe till a fixed length is reached; (2) selecting one end of the cut metal pipe for reaming; (3) punching the reaming part into a plane, so as to prepare the nut head; (4) machining the internal thread on the inner wall at the end, close to the punched plane, of the cut metal pipe; and (5) carrying out inner wall finishing at the end, far away from the punched plane, of the metal pipe, and skiving the pipe wall at such end, so as to prepare the riveted pipe lower layer. The metal rivet nut and the machining process provided by the invention are applicable to machining of various metal containers, overcome the defect that a metal intercrystalline structure is damaged in a welding process, and are particularly applicable to the inner container and the end cover of a water heater, so that the connector part of the water heater can be long in service life and resistant to corrosion.

Description

technical field [0001] The invention relates to a fastener, in particular to a metal riveting nut and its processing technology. Background technique [0002] In daily life, it is often encountered that other items are fixed on metal pipes or plates or are fixedly connected to each other. Generally, welding is used, but in some cases it is not suitable for welding and fixing. For example, when installing hot water components, welding is used. No matter how advanced the welding process is, the welding melting point is as high as 1450°C, which will damage the internal structure of the stainless steel plate to varying degrees. Long-term use will cause rust spots and water leakage, which poses a safety hazard. The above problems can be solved by using the riveting method. Therefore, it is very meaningful to design a metal riveting nut and its processing technology. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned problems...

AI Technical Summary

Problems solved by technology

[0002] In daily life, it is often encountered that other items are fixed on metal pipes or plates or are fixedly connected to each other. Generally, welding is used, but in some cases it is not suitable for welding and fixing. For example, when installing hot water components, welding is used. No matter how advanced the welding process is, the welding melting point is as high as 1450°C, which will damage the internal structure of the stainless steel plate to varying degrees. Long-term use will cause rust spots and water leakage, which poses a safety hazard.

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