Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D53/00—Making other particular articles
  • B21D53/74—Making other particular articles frames for openings, e.g. for windows, doors, handbags
  • B21D53/745—Joining mitred profiles comprising punching the profiles on a corner-angle connecting piece

Definitions

• the present invention relates to a crimping head for the automated assembly of profiles connecting to form a dihedron, said crimping head having two tool-holding jaws (s) for cutting a crimping tab in the wall of the profiles to be connected.
• the document DE-4,409,989 describes a crimping head whose jaws are arranged at the end of pivoting levers pivotally driven by a rotary cam on which said levers are supported by one of their end.
• a cam which makes it possible to be exempt from a hydraulic source due to its actuation by an electric motor has other disadvantages. Indeed, such a cam makes it difficult to adapt the crimping head to profiles of various dimensions.
• the direct contact between the lever and the cam can cause damage to the drive shaft for rotating the cam when resistance develops at one of the jaws.
• the profiles to be assembled together may offer unequal resistance from one section to another. In this case, it can not be ruled out that the opposing resistance eventually distorts the drive shaft in rotation of the cam.
• DE-2.515.951 describes a crimping head comprising two pairs of rods equipped at one end with a crimping tool and connected at their opposite end to a point corresponding to the connection point of the crimping tools. connecting rods with a cylinder rod driving said rods in displacement.
• the direct connection of the connecting rods to the cylinder rod does not allow to exclude damage to the cylinder rod during the development of differentiated strengths of the profiles to be assembled.
• An object of the present invention is to provide a crimping head whose design reduces the control power without impairing the quality of crimping performed.
• Another object of the present invention is to provide a crimping head whose design allows the crimping of two profiles ensuring a synchronous actuation of the two jaws so as to eliminate any offset profiles without risk of damage to the actuator.
• Another object of the invention is to propose an installation for crimping, in particular to form frames from four sections, the design of which makes it possible to overcome the defects mentioned above.
• the subject of the present invention is a crimping head for the automated assembly of connecting sections forming a dihedron, said crimping head comprising two tool-holding jaws (s) for cutting a crimping tab in the wall profiles to be connected, characterized in that the tool-holding jaws (s) are controlled in their simultaneous reciprocal movement by means of a pneumatically actuated mechanical linkage.
• the linkage ensures simultaneous movement of the jaws without increasing the cost of said head. This linkage reduces the control effort to produce and therefore allows the use of a pneumatic actuator.
• the pneumatically actuated linkage comprises at least one lifter moved back and forth by means of at least one pneumatic device, such as a jack, and two sets rods and flails each interposed between the rudder and a crimping tool-jaw, the rudder, which transmits its reciprocating movement to the rest of the crankshaft, in particular the sets of rods and plagues and the jaws tool holder (s), being guided during his move.
• a pneumatic device such as a jack
• the two sets of rods and flails to which the spreader transmits its reciprocating movement each comprise at least two rods and two flails, a first link being connected to the lifter and connected to a first beam with a fixed pivot point, the first beam receiving a second rod connected to the end of a second beam with a fixed pivot point, the second beam carrying a jaw crimping tools.
• the invention also relates to an installation for crimping, including frames formed of four profiles, characterized in that said installation comprises four crimping heads of the aforementioned type operated in synchronism.
• the linkage is actuated by means of a single cylinder operating in synchronism.
• Figure 1 shows an overall perspective view of a crimping head according to the invention.
• Figure 2 shows a top view of the crimping head of Figure 1 in the approach position of the tool.
• FIG. 3 represents a view from above of the crimping head of FIG. 1 in maximum crimping position.
• Figure 4 shows a top view of the crimping head of Figure 1 in the retracted position of the tool.
• Figure 5 shows a partial perspective view of the jaws bearing on two sections to be connected.
• Figure 6 shows a top view of an installation for the simultaneous crimping of four profiles, comprising four crimping heads according to the invention.
• the crimping head 14 of the invention is used to connect two sections 15 to each other. It generally comprises two jaws 10 tool holders each capable of cutting a tongue in the wall of one of the sections 15 to be connected.
• the two jaws 10 are actuated pneumatically simultaneously via the same mechanical linkage to ensure the symmetry of movement of said jaws 10.
• This linkage comprises a spreader 3 moved back and forth by at least one member 1 pneumatic and transmitting its movement with two independent rods 5, each connected to a beam 6 fixed pivot point, the beams 6 each receiving a link 7 connected to the end of a beam 8, fixed pivot point, the flails 8 each carrying a jaw 10 of tool (s) 11 crimping.
• This crimping head architecture 14 allows a precise adjustment of the actions of the jaws 10, a reduction of the control force to be produced and the protection of the pneumatic member, including the differentiated resistances at the level of the profiles to be assembled.
• Each link 5 of a billet / flail assembly interposed between jaw 10 and lifter 3 is thus connected each time by a pivot connection on the one hand to the spreader 3, on the other hand to the beam 6.
• each link 7 of such an assembly is connected each time by a pivot connection on the one hand to the beam 6, on the other hand to the beam 8.
• the lifter 3 is itself moved back and forth by means of less a pneumatic member 1, such as a cylinder.
• the exit of the stem 16 of said cylinder 1 drives the rudder 3 moving along the axis of the rod 16.
• This displacement of the rudder 3 causes a displacement of each rod 5 which will itself rotate a beam 6 around its fixed axis 9a.
• the rotation of said beam 6 moves the link 7 which will cause the beam 8 to rotate about its fixed axis 9b.
• flails 6, 8, links 5, 7 and lifter 3 are mounted on a plate 17 common. This plate 17 can be movable in a direction orthogonal to the movement back and forth of the rudder 3, in particular to allow adjustment up and down of said platen.
• the two flails 6, the two flails 8, the two rods 5 and the two rods 7 are arranged on either side of a plane of symmetry preferably passing through the rod of the cylinder 1.
• Rods and flails affect, seen from above, the general shape of an articulated rhombus.
• a stop 4 is mounted on said plate 17.
• a crimping head 14 generally uses pneumatic pressures of 5 - 6 bars to actuate the jack 1.
• the course of a crimping operation of two profiles 15 forming a dihedral will now be described.
• the operator first places the profiles 15 on a support (not shown in the figures) so as to place the connection area of the two sections 15 at the two jaws 10 of the crimping head 14.
• the tool is then positioned so that each tooth 11 of the two jaws 10 is in bearing contact on one of the sections 15 to be assembled.
• Counter-brackets disposed within the dihedron formed by the sections 15 to be assembled may also, when present, be brought into bearing contact of the inner faces of the dihedron.
• the Figure 2 shows the crimping head 14 in this position, the sections 15 having been omitted.
• the lifter 3 is moved by means of two auxiliary cylinders 2 whose end of stroke corresponds to said intermediate position of the jaws 10.
• the output of the rods 20 of the auxiliary cylinders 2 causes a first displacement of the lifter 3 causing the flails 6 and 8 to rotate in order to partially bring the jaws 10 together.
• the lifter 3 is driven in reciprocating motion by means of at least three jacks 1, 2, two of said cylinders 2 auxiliaries acting on the spreader 3 to bring it to an intermediate position intended to correspond to a position in which the jaws 10 are in contact on the profiles 15 to be connected, at the crimping point thereof, before crimping.
• the establishment of the crimping head 14 in this intermediate position can be obtained by means of a single cylinder 1 provided with at least one back stop.
• the jack 1 is actuated to cause a displacement of the spreader 3 beyond said intermediate position, it is then retracted to a position, determined by the backstop stop, in which the jaws 10 are in contact with the profiles 15 to connected.
• the lifter 3 can also be moved back and forth using a jack 1 whose reversing stroke is limited by means of at least one stop marking a position intended to correspond to a position wherein the jaws 10 are in bearing contact against the profiles 15 to be connected at the crimping point thereof, before crimping.
• a limit stop 13 of the cylinder 1 adjustable in position and arranged on the plate 17 makes it possible to adjust the depth of penetration of the tools.
• This approximation of the jaws 10 allows the teeth 11 carried by said jaws 10 to penetrate the constituent material of the profiles 15 and to cut a tongue in the wall of each profile to be connected.
• This tongue is intended to cooperate with a bracket 22 placed beforehand inside the angle formed by the two sections 15.
• the cooperation of said bracket 22 with at least two crimping tongues, placed in the wall of each section 15 allows to secure said profiles 15 and maintain them in the crimping position.
• each jaw 10 is in the form of a stepped structure comprising several teeth 11 arranged one above the other in the case of a crimping head operating in a horizontal plane.
• a crimping operation such as that described above, several tabs are cut in one movement of the jaws 10.
• at least one of the jaws 10 has, in addition to at least one tooth 11.
• crimping device for cutting a crimping tab in the wall of said profile 15 to be connected, a lug 18 forming an additional point of support to come, in the bearing position, on the top of the angle of the formed dihedron and thus prevent any offset of said profiles 15 during crimping operations.
• This lug 18 equipping at least one of the teeth 11 carried by one of the jaws 10 ensures the relative stability of the two sections 15 during the positioning of the profiles and the cutting of the crimping tabs and to have a ridge perfect dihedral.
• at least one crimping tooth 11 comprises, in its vicinity, a bearing surface 19 constituting a front end limiting the insertion depth of the tooth 11 in said profile 15 during crimping operations. This abutment makes it possible to limit the depth of penetration of the tooth 11 into the constituent material of the profile 15, in order to avoid damage to said wall, without having to regulate very precisely the force applied by the rod 16 of the jack 1.
• Said installation described in Figure 6 can be used to make the simultaneous connections of four profiles to form a frame.
• Said installation 21 comprises four crimping heads 14 according to the invention.
• Each of these heads 14 is placed at one of the corners of the frame to be assembled and is optionally associated with positioning and holding members of the profiles before crimping. The four heads are then actuated synchronously to cut crimping tabs in each of the walls of the profiles to be assembled.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing Of Electrical Connectors (AREA)
• Automatic Assembly (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=36228388

Family Applications (1)

Country Status (3)

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Family Cites Families (4)

• 2005
  • 2005-07-04 FR FR0507061A patent/FR2887792B1/fr not_active Expired - Fee Related
• 2006
  • 2006-07-03 EP EP06778750A patent/EP1904245A1/de not_active Withdrawn
  • 2006-07-03 WO PCT/FR2006/001563 patent/WO2007003790A1/fr not_active Application Discontinuation

Non-Patent Citations (1)

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