SPOT WELDING PROCESS WITH METALLIC ADDITION

Abstract

A spot welding process which uses a metal insert as an insert between the sheets to be welded which belongs to the field of industrial welding, in order to prevent the presence of mark or indentation on the surface of the welds. After the welding process, as the metal insert material melts and dissolves between the overlapped sheets, the state of the art does not provide for the use of metal insert as an insert between the sheets, the spot welding process with insert between (2), made of metal powder or solid metal, which is introduced between the interfaces of the sheets (3) to be welded by the spot welding process, the insert (2) (3), by inert adhesive (4) or other material and process which performs this function, wherein during the melting process the metal insert (2) melts and dilutes together with the base material, i.e. the opposing metal plates (3). The alloy of the metallic insert (2) has chemical and physical properties compatible with the properties of the base metal sheets (3), the spot welding equipment requires that its contact electrodes (5) have the fully flat surfaces (6) and Or special contact geometry.

Claims

1. SPOT WELDING PROCESS WITH METALLIC ADDITION, conceives a spot welding process that does not leave marks or indentation in the sheets after the welding, being that in known processes of spot welding, the superimposed parts to be welded Are pressed against each other by means of electrodes driven by mechanical, pneumatic, hydraulic forces or a mixture thereof, then a short low voltage and high current pulse is supplied and passed through the electrodes, which are not consumable, through the base material, Wherein the method of the invention is characterized by the use of a metal insert (2) made of metals or alloys of metallic powder or of metals or solid metal alloys, which is introduced between the interfaces of the sheets (3) to be welded by (2) is positioned on the base plate (3) by inert adhesive (4) or other material and process which performs this function, wherein during the melt process the insert (2) is melted and diluted together with the base material, i.e. the opposed metal plates 3, it is emphasized that the alloy of the metal insert (2) has the chemical and physical properties compatible with the properties of the sheets (3), the spot welding equipment requires that its contact electrodes (5) have fully flat surfaces (6) and or special contact geometry.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0016] Next, for a better understanding and understanding of how the “SPOT WELDING PROCESS WITH METALLIC ADDITION” is set up, which is presented here, the following illustrative drawings are shown, where you can see:

[0017] FIG. 1—Shows a perspective view of the metal insert, which is interspersed in the welding process.

[0018] FIG. 2—It shows a perspective view of the electrode, whose contact face geometries are planned or special, used in the spot welding process with metallic insert.

[0019] FIG. 3—Shows a perspective view of the insert adhered to the plate, before being submitted to the welding process.

[0020] FIG. 4—Shows one side of two plates instant before being submitted to the spot welding process with insert of metal or metal alloy.

DETAILED DESCRIPTION OF THE INVENTION

[0021] According to the above figures, the “SPOT WELDING PROCESS WITH METALLIC ADDITION”, object of the present patent, devises a resistance spot welding process using insert (2) as insert Or welding interface between the sheet areas (3) to be joined in order to avoid marks or indentation as surface cavities caused by the welding process, so that they are invisible after welding, surface treatment or painting.

[0022] The area, thickness and chemical composition of the welding insert (2) are specified in accordance with the base material to be welded, the tablet (2) being provided with an inert adhesive or other material and process which makes this (4) to be fixed to the base sheet (3), prior to welding which, being inert does not affect the performance of the welding.

[0023] Welding equipment is the same as that used in traditional spot welding, however, the contact terminals or electrodes (5) that press on the areas of the sheets to be welded, instead of having the rounded contact faces, pass through To have totally flat contact faces and or special contact geometry.

[0024] The welding inserts (2) are made of metals or alloys of metallic powder or of metals or solid metal alloys and their chemical composition are compatible with the properties of the sheets to be welded.

[0025] The spot welding process with metallic addition (1) provides for a metallic insert (2), made of metals or alloys of metallic powder or of metals or solid metallic alloys, which is introduced between the faces of the sheet area (3) to be welded by the spot welding process, the metal insert (2) being positioned on the base plate (3) by inert adhesive (4) or other material and process which performs this function.

[0026] During the melting process, the metal insert (2) is melted and diluted together with the base material, ie the opposed metal sheets (3). The alloy of the metal insert (2) has chemical and physical properties compatible with the properties of the base metal sheets (3).

[0027] Spot welding equipment requires that its contact electrodes (5) have fully flat surfaces (6) and or special contact geometry.

[0028] This report was therefore a descriptive of a new conception in the process of spot welding with a metal insert or metal alloy having, as can be seen from the analyzes carried out and figures shown, numerous differences over the conventional processes of in addition to completely different technical and functional characteristics of those pertinent to the state of the art.

[0029] For the advantages it offers, and also because it has truly innovative characteristics that fulfill all the requirements of novelty and originality in the genre, the present “SPOT WELDING PROCESS WITH METALLIC ADDITION” meets the necessary conditions to merit the patent of Privilege of Invention.