Riveting process of pieces of sheet metal

Abstract

The invention discloses a riveting process of pieces of sheet metal. The riveting process of pieces of the sheet metal comprises: punching a piece of the sheet metal; subjecting the rest of the sheet metal to protrusion forming, wherein the positions of protrusions correspond with those of the punched holes; sequentially placing the protrusion-formed sheet metal in an overlapping mode, wherein the protrusions face upwards and the burr stamping directions are the same; enabling the punched holes of the punched sheet metal to be correspond with the protrusions of the protrusion-formed sheet metal, and arranging the punched sheet metal on the top layer of the pieces of the sheet metal; positioning the pieces of the sheet metal placed in an overlapping mode in a mould; and starting the mould to subject the pieces of the sheet metal placed in an overlapping mode to stamping forming to form integral assemblies. The riveting process of pieces of the sheet metal not only guarantees the connection strength among the sheet metal, but also guarantees the flatness requirement of two end faces of products without changing inherent attributes of product materials, and is simple in operation.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a multi-piece metal riveting process. Background technique [0002] Many parts in the machinery industry are processed by riveting process, such as figure 1 As shown, a part formed by riveting a plurality of metal sheets 11 can be roughly divided into three kinds of processing methods: riveting, welding and brazing (bonding). Riveting mainly uses physical methods to combine the stress of the material after it is squeezed, deformed and expanded by an external force, but the tail of the rivet will be exposed on the plane of the part, and the flatness cannot be achieved, which will affect the performance; welding only needs to be done by pressing or heating or The method of using both methods makes the metal material melt and then cool and fuse to achieve the bonding between atoms, but it is difficult to ensure the bonding strength and flatness of multiple metal sheets, and the...

AI Technical Summary

Problems solved by technology

Riveting is mainly through the physical method of using the stress of the material to be squeezed, deformed and expanded by an external force to produce a combination, but the plane of the part will expose the tail of the rivet, and the flatness cannot be achieved, which will affect the performance; welding only needs to be done by pressurization or heating or The method of applying both methods makes the metal material melt and then cool and fuse to achieve the bonding between atoms, but it is difficult to ensure the bonding strength and flatness of multiple metal sheets, and they will fall off when longitudinal impact is applied; brazing is through Use solder to bond the parts together. Due to the use of a strong adhesive for bonding, the overall part has poor electrical conductivity, which greatly reduces the performance of the part.

Images