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
  • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
  • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder

Definitions

• the present invention relates to a unit for crimping a workpiece edge, in particular in sheet metal.
• This pre-crimping operation consists in bending a piece whose edge is 90 ° at the start at around 45 °. This operation is followed by the actual crimping which consists in completely reseating the edge on the workpiece.
• Units which carry out these two operations, but they comprise either one or two blade holders, the movement of which is an arc of a circle. This movement in an arc poses backflow problems in the angles where the two crimps overlap. To avoid backflow of material, the angles must be prepared beforehand.
• the present invention makes it possible to carry out the two operations on the same unit while ensuring a rectilinear movement of the blades during the crimping or pre-crimping operations.
• the crimping unit comprises a flap holder blade fitted with a crimping blade and a pre-crimping blade, a frame, a carriage on which the flap holder is mounted blade, and at least one motor.
• the carriage is guided in its movements by at least one rectilinear guide means, which ensures rectilinear movement of the blade holder during crimping and pre-crimping.
• the guide means is a rail.
• the flap holder blade is articulated on the carriage.
• the blade holder flap can retract and release the matrix during loading and unloading operations and during the passage of pre-crimping and crimping.
• a motor is integral with the carriage.
• the motor actuates the blade holder flap in a tilting movement
• the motor transmits a translational movement to the carriage via an eccentric. This movement will position the pre-crimping blade (low position) and then crimping (high position) before the pre-crimping or crimping operation proper.
• the motor transmits the tilting movement to the blade holder flap via a crank rod system.
• the crank rod system consists of a rod and a crank which actuate a tilting carriage which is connected to the blade holder by at least one rod and if there are two each arranged on each side of the tilting carriage.
• the rotation of the motor drives the crank rod system which raises or lowers the tilting carriage according to the angle of the motor.
• the tilting carriage is cooperates with the frame.
• the tilting carriage performs a translational movement relative to the frame.
• a power motor fixed to the frame actuates the carriage on which the blade holder flap is mounted.
• the system configuration allows the continuous use of the power motor without reversing.
• the power motor actuates the carriage by an eccentric.
• this power motor carries out the pre-crimping and crimping operations by a vertical movement back and forth from the carriage.
• the piece to be crimped is placed on a fixed matrix.
• FIG. 1 is a side sectional view of the crimping unit according to the invention in the pre-crimping approach position
• FIG. 2 is a sectional view along ll-ll without the blade holder
• FIG. 3 is a sectional view along lll-lll without the blade holder
• FIG. 4 is a perspective view of the unit in the pre-crimping approach position
• FIG. 5 is a side sectional view of the crimping unit in the pre-crimp position.
• FIG. 6 is a sectional view along VI-VI
• FIG. 7 is a sectional view along VII-VII
• FIG. 8 is a side sectional view of the unit in the crimping approach position
• FIG. 9 is a sectional view along IX-IX
• FIG. 10 is a sectional view along XX
• FIG. 11 is a perspective of the unit in the crimping approach position
• FIG. 12 is a side sectional view of the crimping unit in the crimping position.
• FIG. 13 is a section along XIII-XIII
• FIG. 14 is a section on XIV-XIV
• FIG. 15 is a side sectional view of the crimping unit in the loading / unloading position.
• FIG. 16 is a section along XVI-XVI
• FIG. 17 is a section along XVII-XVII
• FIG. 18 is a perspective of the unit in the loading / unloading approach position.
• the die 1 is fixed and carries the part 2.
• the blade-holder flap 3 is equipped with a blade-holder 30 which, itself, comprises a pre-crimping blade 31 and a crimping blade 32.
• the flap-holder blade 3 is articulated on a carriage 4 which slides on a fixed frame 5 by four guide rails 50 (FIG. 2).
• the crimping and pre-crimping movement is carried out by the rotation of the motor M1 fixed on the frame which drives an eccentric 51, comprising two eccentric axes A and B, connected to a connecting rod.
• the axis A is the axis of rotation of the motor M1, it is therefore fixed and the axis B is that of the bottom of the connecting rod 6.
• This connecting rod 6 cooperates with the carriage 4.
• the complete rotation of the eccentric 51 makes first lower the carriage 4 and therefore the flap holder 3 to carry out crimping or pre-crimping, then reassemble the carriage 4.
• the loading, unloading and positioning movement of the pre-crimping blade 31 or crimping blade 32 is performed by a second motor M2.
• the motor M2 actuates an eccentric 40 which is connected to the carriage 4 and positions it at the top (crimping position) or at the bottom (pre-crimping position).
• This eccentric has two axes C and D.
• the axis C is the axis of rotation from the top of the connecting rod 6 and the axis D that of the motor M2.
• the motor M2 also drives a crank 7 which causes its tilting carriage 9 to go up or down by its rotational movement via a connecting rod 8.
• the tilting carriage 9 is connected to the frame 5 by a rail 52 which guides its vertical translational movement.
• This tilting carriage 9 cooperates with the blade holder flap 3 by means of a connecting rod 33.
• the translational movement of the tilting carriage 9 which is at a distance equal to the long of the connecting rod 32 in the crimping or pre- crimping drives the flap 3 towards it when the carriage 9 rises and thus releases the matrix 1.
• This rotation of the motor M2 drives the eccentric 40 in a quarter turn (90 °) which causes it to pass to a position where the axis C is above the axis D of the carriage 4 (FIG. 3). In this position the flap 3 is in the low approach position of pre-crimping.
• the pre-crimping blade 31 is then placed above the die 1 and the part 2 while the crimping blade is placed below ( Figure 1).
• Motor M2 stops while motor M1 starts to perform pre-crimping.
• M1 stops and again M2 takes over.
• M2 starts for a 180 ° to 0 ° turn in the opposite direction to the previous direction ( Figures 8 to 10).
• the connecting rods 7 and 8 are then in the same position as when loading unloading ( Figures 15 to 18).
• the carriage 9 is then in the high position thus releasing the matrix 1.
• crank 7 When the motor M2 arrives in the 0 ° position, as seen in FIG. 10, the crank 7 is diametrically opposite to its pre-crimping approach position in FIG. 3 and the connecting rod 8 therefore has a position symmetrical with respect to the position. pre-crimping approach.
• the rod 33 is again perpendicular to the flap 3 ( Figure 8).
• the motor M2 stops and the motor M1 starts again to make a complete revolution as for the pre-crimping and thus realizes the crimping of the part 2.
• M1 stops again and M2 starts again to release the die 1 in order to unload then load the piece to be crimped and the cycle begins again.
• This crimping unit can also be used to crimp large parts with deep bends or small parts. Because the loading and unloading operations significantly release the matrix.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacturing Of Electrical Connectors (AREA)
• Warehouses Or Storage Devices (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=8857797

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (5)

• 2000
  • 2000-12-18 FR FR0016497A patent/FR2818173B1/fr not_active Expired - Fee Related
• 2001
  • 2001-12-14 WO PCT/FR2001/003998 patent/WO2002049786A1/fr active Application Filing
  • 2001-12-14 CN CN 01808009 patent/CN1257778C/zh not_active Expired - Fee Related
  • 2001-12-14 BR BR0108299-0A patent/BR0108299A/pt not_active IP Right Cessation
  • 2001-12-14 EP EP01271270A patent/EP1409176A1/fr not_active Withdrawn

Non-Patent Citations (1)

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