Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/10—Riveting machines
  • B21J15/16—Drives for riveting machines; Transmission means therefor
  • B21J15/26—Drives for riveting machines; Transmission means therefor operated by rotary drive, e.g. by electric motor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/10—Riveting machines
  • B21J15/28—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups
  • B21J15/285—Control devices specially adapted to riveting machines not restricted to one of the preceding subgroups for controlling the rivet upset cycle
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/10—Riveting machines
  • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
  • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
  • B21J15/42—Special clamping devices for workpieces to be riveted together, e.g. operating through the rivet holes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/02—Riveting procedures
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/10—Riveting machines
  • B21J15/14—Riveting machines specially adapted for riveting specific articles, e.g. brake lining machines
  • B21J15/142—Aerospace structures
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
  • B21J15/00—Riveting
  • B21J15/38—Accessories for use in connection with riveting, e.g. pliers for upsetting; Hand tools for riveting
  • B21J15/44—Rivet hole positioners
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49908—Joining by deforming
  • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
  • Y10T29/49943—Riveting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49826—Assembling or joining
  • Y10T29/49947—Assembling or joining by applying separate fastener
  • Y10T29/49954—Fastener deformed after application
  • Y10T29/49956—Riveting

Definitions

• the present invention generally relates to the riveting of parts, in particular the riveting of aeronautical parts, such as fuselage sheets.
• the riveting machine comprises a lower rivet which is intended to cooperate with an upper rivet to crush a rivet placed inside the hole drilled through the parts to be riveted.
• the upper rivet serves as a holding tool and for setting up the rivet in the drilled hole.
• the lower rivet serves as a pushing tool and is actuated to exert a force on the rivet in the direction of the upper rivet and thus crush the rivet in the pierced hole of the parts to be riveted.
• the riveting of parts may require moving the upper rivet (down and up) over a long distance, especially when obstacles are present near the area to be riveted.
• the document IT UB20 152664 A1 describes a riveter comprising a frame equipped with a guide element for an insertion rod movable between a first rest position and a second insertion position, the insertion rod being actuated between its first and its second position by an electric motor.
• the present invention aims to provide a new machine and a new method of riveting to overcome all or part of the problems outlined above.
• the invention relates to a riveting machine for riveting two parts, such as sheets, between them.
• the machine includes:
• a motorization system for example a stepper motor associated with a reduction gear, comprising an output shaft;
• a set of connecting rods articulated together comprising a first connecting rod mounted integral in rotation with the output shaft of the motorization system, and a second connecting rod articulated to the first connecting rod;
• a guide device configured to guide the movement of the slide along a guide axis
• lower rivet movable in a direction parallel to the guide axis of the guide device to cooperate with the upper rivet so as to crush the rivet, when said rivet is placed inside a orifice drilled through the parts to be riveted, between said lower and upper studs;
• a control unit configured to rotate the output shaft of the motorization system so as to move the connecting rods of the connecting rod system from a folded position to an extended position in which the connecting rods are aligned along an axis which intersects the axis of the drive system output shaft.
• the riveting machine according to the invention may also comprise one or more of the following characteristics taken in any technically permissible combination.
• the machine comprises an upper sheet clamp and a lower sheet clamp making it possible to clamp the parts to be riveted one against the other, the upper sheet clamp having an opening for positioning the rivet carried the upper rivet in an orifice drilled through the parts to be riveted, the lower clamp having an opening for the passage of the lower rivet and thus allow the crushing of the rivet.
• the upper sheet clamp which has a section preferably of generally rectangular shape, is pivotally mounted around the axis of the slider, to allow said upper sheet clamp to be moved along a protruding part of the part to be riveted, on the side of which the upper clamp is located, without interference with this protruding part.
• the number of connecting rods of the set of connecting rods is equal to two.
• the first connecting rod has an end through which an orifice is provided, and the output shaft of the motorization system extends through said orifice from the end of the first connecting rod.
• the first connecting rod has a median longitudinal axis which intersects with the axis of the output shaft of the longitudinal motorization system.
• the guide device has a through hole in which the slider is engaged, the axis of the through hole being the guide axis of the slider.
• the axis of alignment of the rods in the deployed state is parallel, preferably coaxial, with the axis of movement of the lower rivet which passes through the center of the lower rivet.
• the angle of rotation of the motorization system is between 20° and 180°.
• the invention also relates to a method of riveting using a machine according to any one of the preceding embodiments, in which the method comprises the following steps:
• Figure 1 is a perspective view of a riveting machine according to one embodiment of the invention.
• Figure 2 is a perspective view of part of the riveting machine of Figure 1 which comprises a motorization system to which is coupled a set of connecting rods articulated to a slider which is provided with an upper rivet and whose the movement is guided by a guide device, the set of connecting rods being in the folded position;
• Figure 2A is a view of part of the riveting machine of Figure 1, in front view of the drive system;
• Figure 2B is a view of part of the riveting machine of Figure 1, in axial section of the motorization system;
• Figure 3 is a sectional view of part of the riveting machine of Figure 1, showing two parts to be riveted clamped between a lower sheet clamp and an upper sheet clamp, in the upper position of the upper rivet which carries a rivet, and in the lower position of the lower rivet;
• Figure 4 is a view of the elements of Figure 2 during deployment of the set of connecting rods, causing the slider to descend along the guide device;
• Figure 5 is a view of the elements of Figure 4 in the deployed state of the set of connecting rods so that the upper snap is in the low position;
• Figure 6 repeats the elements of Figure 3, in the lower position of the upper rivet so that the rivet is inserted into a hole drilled through the part to be riveted, the lower rivet being in the lower position;
• Figure 7 uses the elements of Figure 6, the lower rivet being moved to the high position to crush the rivet held by the upper rivet in the hole drilled through the parts to be riveted;
• Figure 8 is a sectional view of part of a riveting machine according to another embodiment of the invention, for which the upper sheet clamp is movable to pivot about an axis parallel to the axis of movement up and down the upper rivet, Figure 8 showing the upper rivet in the high position so that the rivet is not yet introduced into the hole drilled through the parts to be riveted;
• Figure 9 shows the elements of Figure 8, in the lower position of the upper rivet so that the rivet is introduced into the hole drilled through the parts to be riveted;
• Figure 10 is a flowchart illustrating the steps of a method according to one embodiment of the invention.
• the machine allows the riveting operation to be carried out with a large displacement stroke of the upper rivet, for example 200 millimetres.
• the riveting machine makes it possible to apply a high thrust force to the rivet, for example of the order of 100 daN to 10,000 daN, particularly suitable for aeronautical type applications.
• the thrust force is applied to the rivet by displacement of the lower rivet and the upper rivet serves as counter-support.
• the assembly formed by the slider 4, the connecting rod system 3 and the motorization system 2 is arranged, as detailed below, so as to take up the thrust effort reliably, without the risk of the connecting rods folding and the motorization output shaft rotating.
• the machine includes a drilling tool to pierce a hole through the parts to be riveted into which the rivet can then be brought by the upper rivet.
• the riveting machine comprises an upper assembly which comprises an upper rivet 5 connected, by a slider and a system of connecting rods 3, to a motorization system 2.
• the riveting machine also comprises a lower assembly which comprises a lower rivet 9 which can be moved, preferably vertically, in the direction of the upper rivet in order to be able to exert a thrust force on a rivet positioned in a hole drilled in the parts to be riveted. , so that the rivet is crushed between the lower rivet and the upper rivet.
• a lower assembly which comprises a lower rivet 9 which can be moved, preferably vertically, in the direction of the upper rivet in order to be able to exert a thrust force on a rivet positioned in a hole drilled in the parts to be riveted. , so that the rivet is crushed between the lower rivet and the upper rivet.
• the riveting machine has in particular a C-shaped frame, the upper part of the C carrying said motorization system which makes it possible to move the upper rivet using the system rods 3, and the lower part of the C carrying the lower rivet.
• the parts to be riveted are positioned in the opening of the C.
• the parts 81, 82 to be riveted are kept pressed against each other by an upper clamp 110 and a lower clamp 120 as visible in Figure 3.
• the drive system 2 has an output shaft 21 of axis A2.
• the output shaft 21 preferably extends horizontally.
• the motorization system comprises a geared motor assembly.
• the motor is preferably a stepper motor.
• the machine also includes a set 3 of connecting rods articulated together.
• a first connecting rod 31 has one end which is mounted integral in rotation with the output shaft 21 of the motorization system 2, and a second connecting rod 32 is hinged to the other end of the first connecting rod 31.
• a slider 4 is hinged to the second connecting rod 32 and provided, at its end opposite to that articulated to the second connecting rod 32, the top snap 5.
• the first connecting rod 31 is fixed to the output shaft 21 of the motorization system 2 by shrink-fitting on the output shaft 21 of the motorization system 2.
• the end of the connecting rod 31 has a through hole for its mounting on the output shaft 21.
• the end of the connecting rod 31 is mounted integral with the output shaft 21 via a mounting part 23, itself mounted by shrink fitting on the output shaft 21.
• the connecting rod 31 is thus integral in rotation with the output shaft 21 of the motorization system.
• the median longitudinal axis A31 of the first connecting rod 31 intersects with the axis A2 of the output shaft 21 of the longitudinal motorization system 2.
• the A3132 articulation axis of the connecting rods is parallel to the axis A2 of the output shaft 21 of the motorization system.
• the axis of articulation A34 of the slider 4 to the connecting rod 32 is parallel to the axis A2 of the output shaft 21 of the motorization system.
• the machine comprises a guide device 6 which makes it possible to guide the slider 4.
• the guide device 6 has a through hole in which the slider 4 is engaged.
• the slider 4 is thus guided sliding by the guide device 6 in a direction perpendicular to the axis of the output shaft 21 of the motorization system 2.
• the slider 4 can thus slide vertically.
• the entire motorization system, the connecting rods with slider, and the guiding device is mounted on a carriage that can be moved along a guide rail along an axis parallel to the axis of the shaft. output of the motorization system 2.
• the guide rail is fixed to a movable support vertically, and optionally horizontally.
• the lower rivet 9 forms a movable thrust element, preferably vertically, towards the upper rivet 5 and capable of cooperating with the upper rivet 5 to crush the rivet 7, when said rivet is placed inside a orifice 87 pierced through the parts 81, 82 to be riveted, between said rivets 5, 9 lower and upper ( Figures 6-7).
• the parts 81, 82 to be riveted are held tight against each other using a lower clamp 120 and an upper clamp 110.
• the connecting rods 31, 32 are aligned along an axis A3 coaxial with the guide axis A6 6 of the guide device, that is to say the longitudinal axis A4 of the slider 4, which also corresponds to the thrust axis A1 of the lower rivet 9.
• Axis A3 corresponds to the median longitudinal axis of the connecting rods in the extended state.
• the axis A2 of the output shaft 21 of the motorization system 2 and the axis A3 for aligning the connecting rods in the deployed position are coplanar .
• Such an arrangement allows the alignment of the connecting rods 31, 32 and the output shaft 21 of the motorization system 2 to take up the thrust force of the lower rivet 9, reliably without risk of untimely folding of the connecting rods, and thus makes it possible to obtain a reliable crushing of the rivet 7 by pushing the lower rivet 9 in the direction of the upper rivet 5, even for a great effort.
• the slider In the folded position of the rods as shown in Figures 1-4, the slider is in the high position.
• the passage in the deployed position of the connecting rods makes it possible to move the slider downwards and thus to lower the upper rivet 5, to bring the rivet 7 into the drilling orifice 87 provided through the two parts 81, 82 to be riveted.
• the feed and thrust direction on the rivet is vertical.
• connection rods between the motorization system and the upper rivet allows the upper rivet to be moved over a long stroke which is a function of the length of the rods. Since the connecting rods are elongated elements, such as rods, their size in width is limited, so that the machine can easily be designed to allow movement of the connecting rods, while maintaining a limited size of the machine.
• the machine comprises an upper sheet clamp 110 and a lower sheet clamp 120 making it possible to clamp the parts 81, 82 to be riveted against each other.
• the upper clamp 110 has an opening for positioning the rivet 7 carried the upper rivet 5 in a hole drilled through the parts 81, 82 to be riveted.
• the lower sheet clamp 120 has an opening for the passage of the lower rivet 9 and thus allow the crushing of the rivet 7 against the upper rivet 5, in the hole drilled through the parts 81, 82 to be riveted.
• the lower rivet 9 is movable along the axis A1, preferably vertical, to push on the rivet and thus crush it while the upper rivet, and the associated assembly formed by the slider, the connecting rods and the motor shaft resume the thrust force of the lower link.
• the upper sheet clamp, referenced 110 ' is pivotally mounted around an axis parallel, preferably coaxial, to the axis A4 of the slider 4, which also corresponds to axis A1 movement of the lower rivet (or the axis of the hole drilled in the parts to be riveted).
• the upper clamp 110′ has a section that is preferably generally rectangular in shape and elongated along the axis A1.
• the connecting rods 31, 32 are in the folded position so that the upper rivet 5 is in the high position.
• the upper rivet 5 is positioned above a hole drilled through the two parts 81, 82 to be riveted.
• the motorization system 2 is powered to rotate in the direction of deployment of the connecting rods (step 1010), preferably order of a quarter turn.
• the rotation of the motorization system 2 thus causes the slider 4 to move along the guide zone of the guide device 6, which is a through hole in the example illustrated in the figures, in the direction of a descent (vertical) of the upper rivet 5.
• step 1020 the lower rivet 9 is moved towards the upper rivet 5 to push on the rivet 7 and crush it, the thrust force being taken up by the assembly formed by the upper bottle 5, the slider 4, the set of connecting rods 3 and the output shaft 21 of the motorization system.
• the motorization system 2 and the movements of the various elements, such as the lower rivet 9, and, depending on the embodiment chosen, the rotation of the upper clamp 110', can be controlled by a control unit 100 ( Figure 1).
• the control unit 100 can be in the form of a processor and a data memory in which computer instructions that can be executed by said processor are stored, or even in the form of a microcontroller.
• the functions and steps described can be implemented in the form of a computer program or via hardware components (eg networks of programmable gates).
• the functions and steps operated by the control unit in particular for the control of actuation of the lower rivet, for the control of the motorization system, of motor(s) associated with the carriage(s) of movement of the assembly which carries the motorization system to which the upper rivet and the sliding guide device are coupled, and for the possible control of the rotation of the upper sheet clamp, can be carried out by sets of instructions or modules implemented in a processor or controller or be produced by dedicated electronic components or components of the FPGA or ASIC type. It is also possible to combine computer parts and electronic parts.
• the control unit is thus an electronic and/or computer unit.
• said unit is configured to carry out a given operation

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Insertion Pins And Rivets (AREA)
• Press Drives And Press Lines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=77411899

Family Applications (1)

Country Status (5)

Family Cites Families (9)

• 2021
  • 2021-07-07 FR FR2107359A patent/FR3124959B1/fr active Active
• 2022
  • 2022-05-17 JP JP2023577380A patent/JP2024524917A/ja active Pending
  • 2022-05-17 CN CN202280044576.0A patent/CN117545569A/zh active Pending
  • 2022-05-17 EP EP22730960.6A patent/EP4366896A1/de active Pending
  • 2022-05-17 WO PCT/FR2022/050932 patent/WO2023281169A1/fr active Application Filing

Also Published As

Similar Documents

Legal Events