Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
  • B23K33/004—Filling of continuous seams
  • B23K33/008—Filling of continuous seams for automotive applications
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/20—Bonding
  • B23K26/21—Bonding by welding
  • B23K26/24—Seam welding
  • B23K26/244—Overlap seam welding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K2101/00—Articles made by soldering, welding or cutting
  • B23K2101/34—Coated articles, e.g. plated or painted; Surface treated articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K2103/00—Materials to be soldered, welded or cut
  • B23K2103/08—Non-ferrous metals or alloys

Definitions

• the present invention relates to an element consisting of three sheet metal parts to be assembled by welding.
• the laser welding beads require good docking qualities between the sheets.
• a minimum clearance of 0.1 mm between these sheets is necessary to ensure the evacuation of zinc vapors resulting from the welding operation.
• a maximum clearance of 0.3 mm between these sheets must be respected in order to obtain a bead ensuring good holding of the sheets.
• the maximum play criteria between the sheets are more severe than for an assembly having two thicknesses.
• the embodiment implemented for an element part comprising the thicknesses of two parts requires long preparation steps when it is desired to adapt it to an assembly comprising the thicknesses of three parts.
• the sheets must be rigorously selected, only the sheets having a good surface quality can to be used. All these elements are not compatible with parts produced in large series as in the field of the automobile.
• the object of the invention is to propose an element consisting of three sheet metal parts intended to be assembled by welding, which avoids these various disadvantages and which is simple to implement.
• the subject of the invention is therefore an element consisting of three sheet metal parts intended to be assembled by welding, in particular by laser welding, characterized in that, on an area of said element, two of said parts comprise a succession of cutouts defining parts. and filled parts, and arranged in such a way that a solid part belonging to a first part is arranged opposite an empty part belonging to a second part, so that each part of the element intended to be welded comprises the thicknesses of two parts.
• the element comprises one or more of the following characteristics, taken separately or in any technically possible combination:
• the cuts may form a succession of slots, preferably of trapezoidal shape
• a solid part belonging to a first sheet and an empty part belonging to a second sheet, arranged vis-à-vis one another, may have the same dimensions;
• each solid part or of each empty part may be between 40 and 60 mm, and the width of each solid part or of each empty part may be between 8 and 15 mm; -
• the cutouts may be formed in first and second parts, arranged on either side of the third part.
• the cutouts can be formed in the free ends of the sheet metal parts.
• the free ends of the two sheet metal parts comprising the cut-outs can be arranged on either side of a free end belonging to the third part.
• the free end belonging to the third part may be devoid of cutting.
• the sheet metal parts may have a thickness of between 0.67 and 3 mm.
• the invention also relates to a motor vehicle comprising an element as described above.
• FIG. 1 is a schematic perspective exploded view of three sheet metal parts to be assembled by welding to form an assembly
• FIG. 2 is a schematic perspective view showing the positioning of two sheet metal parts, belonging to the assembly, with respect to each other;
• FIG. 3 is a schematic perspective view showing the three sheet metal parts assembled, and
• FIG. 4 is a sectional view along the line A-A of Figure 3, the parts being held in position by clamping elements.
• FIG. 1 three sheet metal parts 2, 3, 4 are shown. These 3 pieces 2, 3, 4 are intended to be assembled by laser welding so as to form an assembly 1 as shown in FIG. 3.
• These parts may have a thickness of between 0.67 and 3 mm.
• the plates 3 and 4 extend one below the other, their bodies, respectively 3b and 4b, extending substantially parallel and at a distance from each other. 'other.
• Each sheet 3 or 4 has a respectively embossed area 3c or 4c extending respectively between the body 3b or 4b and the end 3a or 4a. These areas 3c and 4c are intended to bring the ends 3a and 4a to each other so as to achieve the welding of these ends.
• the sheet 2 is flat and disposed parallel to the bodies 3b and 4b respectively belonging to the sheets 3 and 4. From its end 2a, the sheet 2 extends in the opposite direction to the sheets 3 and 4; the sheet 2 thus extends in the extension of the plates 3 and 4.
• end 2a is disposed between the ends 3a and 4a.
• the ends 3a and 4a are disposed on either side of the end 2a.
• the ends 3a and 4a of the plates 3 and 4 are arranged so as to comprise a succession of cuts 5.
• the cut-outs 5 form a succession of crenellations determining solid portions 6 and empty portions 7.
• the solid portions 6 and the empty portions 7 determining the slots have a trapezoidal shape.
• the trapezium, thus formed can be an isosceles trapezium.
• the dimensions of the solid parts 6 and the empty parts 7 of each slot can vary in length from 40 to 60 mm, and in width from 8 to 15 mm.
• the solid parts 6 and the empty parts 7 are arranged on either side of the end 2a of the sheet 2 and more particular - They are arranged so that a solid part belonging to the sheet 3 or 4 is arranged vis-à-vis an empty portion belonging to the sheet 3 or 4, as shown in Fig 2 where the sheet 2 has been removed to better see the positioning of the solid parts and empty parts.
• the solid parts and the empty parts have the same dimensions.
• the dimensions of the solid parts and the empty parts may be different from each other provided that the solid portions of the end 3a are equivalent to the dimensions 4, the end portions 4a are disposed opposite each other or that the empty portions of the end 3a are equivalent to the dimensions of the solid portions of the end 4a disposed opposite each other.
• the sheets are correctly positioned, as mentioned above, they are held in place, for example in a vise 8, so that the welding operation can be performed.
• each weld bead 9 is then made where the assembly 1, formed by the three assembled parts, has only two thicknesses.
• the invention can of course be adapted to other assemblies whose parts are arranged differently or have different shapes, likewise the cutting areas may not be arranged at the ends of the sheet metal parts but in the body of the same. this.
• the invention is particularly suitable for assemblies having a curved shape.
• the invention may especially apply to assemblies belonging to the structure of a motor vehicle.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Plasma & Fusion (AREA)
• Laser Beam Processing (AREA)
• Body Structure For Vehicles (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=41110385

Family Applications (1)

Country Status (4)

Citations (4)

Family Cites Families (4)

• 2009
  • 2009-02-09 FR FR0950792A patent/FR2941881B1/fr not_active Expired - Fee Related
• 2010
  • 2010-01-28 CN CN201080007252.7A patent/CN102307700B/zh not_active Expired - Fee Related
  • 2010-01-28 WO PCT/FR2010/050139 patent/WO2010089494A1/fr active Application Filing
  • 2010-01-28 EP EP10707612A patent/EP2393629A1/fr not_active Withdrawn

Patent Citations (4)

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