Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
  • B29C66/022—Mechanical pre-treatments, e.g. reshaping
  • B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
  • B29C66/02241—Cutting, e.g. by using waterjets, or sawing
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
  • B29C66/024—Thermal pre-treatments
  • B29C66/0246—Cutting or perforating, e.g. burning away by using a laser or using hot air
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
  • B29C66/112—Single lapped joints
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
  • B29C66/114—Single butt joints
  • B29C66/1142—Single butt to butt joints
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
  • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
  • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
  • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
  • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
  • B29C66/244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being non-straight, e.g. forming non-closed contours
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
  • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
  • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
  • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
  • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2791/00—Shaping characteristics in general
  • B29C2791/004—Shaping under special conditions
  • B29C2791/009—Using laser
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C2793/00—Shaping techniques involving a cutting or machining operation
  • B29C2793/0081—Shaping techniques involving a cutting or machining operation before shaping
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/3044—Bumpers

Definitions

• the present invention relates to a method of manufacturing an assembly comprising at least a first bodywork part and a second bodywork part.
• Vehicle bodies for example automobiles, are made of several parts which are assembled together. These parts are for example a wing, a bumper. These parts are visible from the outside, that is to say by an observer standing outside the vehicle. It is therefore crucial that the separation line (docking game) between any two adjacent pieces is the least discernable possible to the naked eye for such an observer.
• the body parts are either molded when they are plastic or stamped when they are sheet metal.
• the visible face of the part, at its edge, necessarily has a rounded edge .
• the visible face of the piece, at its edge, also has a rounded edge.
• Figure 3 shows in cross section a first body part 10a which has a first face (visible) 11a and a border 19a.
• the edge 191a of the border 19a at the first face 11a is rounded.
• Figure 3 shows in cross section a second body part 20a which has a first face (visible) 21 and a border 29.
• the edge 291a of the border 29a at the first face 21a is rounded.
• the level shift between two pieces at their junction line is known as a dislocation, this gap creating a step between their respective visible faces in a direction perpendicular to these faces.
• the perceived clearance (J) by an outside observer is represented by the two parallel vertical dotted lines on either side of this junction line 99a. Excessive visibility of this junction line 99a and perceived play are undesirable.
• the first piece 10a (respectively second piece 20a) is extended, along this junction line, in the opposite direction of its first face 11a (respectively 21a), by a fixing lug 18a. (respectively 28a). These fastening tabs meet to form a flange with which the first piece 10a and the second piece 20a are assembled.
• the present invention aims to overcome the disadvantages mentioned above.
• the aim of the invention is to propose a method which makes it possible to construct an assembly comprising a first piece of plastic bodywork and a second piece of plastic bodywork and by which the clearance perceived between these parts at their junction line can be minimized.
• the method comprises a step (b) where a first coating is deposited on the first face of the first piece and a second coating is deposited on the first face. from the second room.
• first respective faces before the coating operation (for example their painting) of these first faces to avoid the phenomenon / lack of edge effect.
• the material bead of the coating that forms near the edge of each of the initial edges (before cutting parts) is removed during cutting. The clearance perceived between the first piece and the second piece, when these two pieces are assembled, is therefore minimized compared to the case of the prior art where the edge of each of these borders is rounded and coated.
• the cutting equipment is a beam, in particular a laser beam.
• the cutting equipment is a wire heated to a temperature above the melting temperature of the material constituting the first piece and the second piece.
• step (d) the first piece and the second piece are assembled in such a way that said edges marry along their entire length.
• the first piece and the second piece are assembled such that in each point of one of the edges, the plane tangential to the first face of the first piece is identical to the plane tangent to the first side of the second piece.
• the invention also relates to an assembly comprising at least a first plastic body part having a first face and a second face opposite to the first face, and a second plastic body part having a first face and a second face opposite to the first face. first face.
• the first piece is in the form of a shell and has a border whose edge at the first face has a sharp angle
• the second piece is in the form of a shell and has a border whose edge at the level of the first face has a sharp angle
• the first piece and the second piece being assembled using assembly means so that the edge of the second piece and the edge of the first piece marry along their entire length .
• FIG. 1A illustrates a first step of the method according to the invention
• FIG. 1B illustrates another step of the method according to the invention
• FIG. 1C illustrates another step of the method according to the invention
• FIG. 2 a perspective view of the first part and the second part of an assembly according to the invention, after assembly;
• the assembly comprises two plastic body parts of a vehicle.
• the invention applies similarly to the case where the assembly comprises three or more pieces, the first piece 10 and the second piece 20 may be any two adjacent pieces of the set.
• a first piece 10 and a second piece 20 are provided which are each molded in the form of a shell.
• a shell designates a curved piece in three dimensions, one dimension (the thickness) of which is very small compared to the other two (this shell being able, in the case of a curve, to be flat for form a plate).
• the first piece 10 (respectively second piece 20) has a first face 11 (respectively 21) and a second face 12 (respectively 22) opposite the first face 11 (respectively 21) (step (a), Figure 1A).
• the first piece 10 has a border which forms part of the periphery of its first face 11 (and therefore a portion of the periphery of its second face 12).
• This border is a part or the whole of a lateral face of the first piece 10, which extends from its first face 11 to its second face 12. This edge is thus oriented in the direction of the thickness of the first piece .
• This border has a rounded edge at the first face 11, as shown in Figure 1A.
• the second piece 20 has a border which forms part of the periphery of its first face 21, which is a lateral face of the first piece 10, and which extends from its first face 21 to its second face 22
• This border has a rounded edge at the first face 21, as shown in Figure 1A.
• these initial edges of the first part 10 and the second part 20 are for example mirrors of one another, that is to say that they have complementary forms. Thus, if we bring these borders closer to one another they marry (in other words they come into contact at each point over their entire length). Alternatively, these initial borders are not mirrors of each other.
• a finishing coating 13 is deposited on the first face 11 of the first piece 10 and a finishing coating 23 on the first face 21 of the second piece 20 (step (b), Figure 1B).
• the coating (13, 23) finishing is for example a deposition of material by spraying or immersion, for example a paint deposit.
• this coating (13, 23) is a film (protective or decorative) applied to the first piece 10 and the second piece 20.
• the case in which the first face 11 of the first piece 10 and the first face 21 of the second piece 20 have this coating (13, 23) is described below.
• the coating 13 of the first part 10 and the coating 23 of the second part 20 are identical, which minimizes the visibility of the separation between these two parts (10, 20).
• each of the coatings (13, 23) being small compared with the thickness of the first piece 10 and the second piece 20, it is considered that the first face 11 of the piece 10 and the first face 21 of the second piece 20 are merged with the external faces (visible) of the coatings (13, 23) deposited on each of these parts (10, 20).
• Each of the coatings (13, 23) follows the rounded edges of the edges at the first face (11, 21) of each of the pieces (10, 20), so that the outer faces of the coatings (13, 23) are rounded at the place of these edges.
• a cutting edge 19 is cut on the first piece 10 by means of a cutting equipment 70, the edge 191 of which at the first face 11 has a sharp angle, and is cut on the second piece 20 with this cutting equipment 70 a border 29 whose edge 291 at the first face 21 also has a sharp angle (step (c), Figure 1C).
• a border of a piece has a sharp-edged edge at a face, it is meant that the border (lateral face) delimiting this face forms with this face a sharp edge (without radius) with an angle strictly greater than 0 ° and less than or equal to 90 °, this angle being measured in the interior of the room (that is to say through the material of the room).
• the border 19 and the border 29 are in contact when the first piece 10 and the second piece 20 are assembled.
• borders (19, 29) are for example located near the initial edges (before cutting) of these parts (10, 20) having a rounded edge, so that the loss of material is minimized. In any case, the cutting operation removes these rounded edges. Note that the invention also applies to the case where the first part 10 and the second part 20 have, before depositing the coating (13, 23), a border having a sharp edge edge. Indeed in this case it forms a bead of material of the coating near this edge, however the cutting operation of the parts eliminates these beads.
• the edge 291 of the second piece 20 and the edge 191 of the first piece 10 are cut so that these edges (191, 291) are able to fit along their entire length when the first piece 10 and the second piece 20 are assembled.
• first piece 10 and the second piece 20 are assembled so that their edges (191, 291) marry along their entire length.
• edge (191, 291) of each of these pieces (10, 20) designates, for each of these pieces, the edge at the junction of its first face (11, 21) and its lateral face (edge 19, 29).
• this maximum distance is less than 1 mm, preferably less than 0.1 mm, so that the game perceived is as low as possible.
• the cutting equipment 70 is a beam.
• beam designates a ray of particles or energy propagating in space.
• the edge 19 of the first piece 10 has an edge 191 with a sharp angle at the first face 11 and also at the second face 12 of the first piece 10, and the border 19 is straight (rectilinear) in the direction of the cut thickness of the piece.
• the edge 29 of the second piece 20 has an edge 291 with a sharp angle at the first face 21 and also at the second face 22 of the second piece 20, and the edge 29 is straight in the direction of the cut thickness of the piece.
• the beam used in the method according to the invention is any beam which is able to cut a part.
• this beam is a laser beam.
• a laser beam has the advantage over other beams (and with respect to a hot wire, see below), as demonstrated by the inventor's tests, that the edge edges (191, 291) parts (10, 20) are more vivid.
• the beam is a water jet as narrow as possible projected at a pressure much higher than atmospheric pressure, or an air jet charged with particles capable of cutting the first piece 10 and the second piece 20.
• the cutting equipment 70 is a wire heated to a temperature greater than the melting temperature of the material constituting the first piece 10 and the second piece 20.
• the cutting equipment 70 is a cutter.
• the cutting equipment 70 is a machining machine. This machine mills the initial border of each of the pieces (10, 20) until the rounded edge of that edge has been removed.
• step (d) the first piece 10 and the second piece 20 are assembled so that at each point of one of these edges (191, 291), the tangent plane PI on the first side 11 of the first piece 10 is identical to the tangent plane P2 to the first face 21 of the second piece 20.
• the first piece 10 and the second piece 20 are shaped to allow such an assembly.
• FIG. 1D shows the tangent planes (PI, P2).
• Figure 2 is a perspective view of the first part 10 and the second part 20 after assembly.
• the relative positioning of the first piece 10 and the second piece 20 is obtained thanks to a precise assembly of these pieces.
• first piece 10 and the second piece 20 are assembled using assembly means 40.
• these assembly means 40 comprise a first assembly means 41 fixed on the second face 12 of the first piece 10 and a second assembly means 42 fixed on the second face 22 of the second piece 20.
• the first assembly means 41 (respectively the second assembly means 42) is an L-shaped profile whose branch is fixed (for example by welding or gluing) on the second face 12 (respectively 22) of the first part 10 (respectively the second part 20).
• the other branch of the first assembly means 41 is facing the other branch of the second assembly means 42, and these two other branches are assembled by bolt / nut or other mechanical means of securing. This situation is illustrated in FIG. 1D and FIG. 2, the alternating dotted line schematizing this joining.
• the first assembly means 41 (respectively the second assembly means 42) is a series of L-shaped brackets distributed along the edge 19 (respectively 29) of the second face 12 (respectively 22) where they are fixed. These brackets are assembled in pairs in order to assemble the first part 10 and the second part 20.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Connection Of Plates (AREA)
• Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=52477931

Family Applications (1)

Country Status (5)

Families Citing this family (1)

Citations (1)

Family Cites Families (5)

• 2014
  • 2014-12-12 FR FR1462331A patent/FR3029826B1/fr not_active Expired - Fee Related
• 2015
  • 2015-12-08 MA MA041153A patent/MA41153A/fr unknown
  • 2015-12-09 CN CN201580067470.2A patent/CN107000324A/zh active Pending
  • 2015-12-09 WO PCT/FR2015/053393 patent/WO2016092213A1/fr active Application Filing
  • 2015-12-09 EP EP15823627.3A patent/EP3230042A1/fr not_active Withdrawn

Patent Citations (1)

Non-Patent Citations (1)

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