Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
  • F16B19/04—Rivets; Spigots or the like fastened by riveting
  • F16B19/08—Hollow rivets; Multi-part rivets
  • F16B19/086—Self-piercing rivets
• • 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
  • B21J15/025—Setting self-piercing rivets
• • 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
  • B21J15/04—Riveting hollow rivets mechanically
  • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
• • 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
  • B21J15/105—Portable riveters
• • 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
  • Y10T29/53—Means to assemble or disassemble
  • Y10T29/53709—Overedge assembling means
  • Y10T29/53717—Annular work
  • Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
  • Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter
  • Y10T29/53752—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter having rotary drive mechanism

Definitions

• the invention relates to a device for producing a rivet connection with means for shooting and pulling the rivet according to the preamble of claim 1 and a rivet associated with this device.
• rivet connections are used to connect workpieces, in particular sheet metal, especially when the workpieces to be connected are only accessible from one side.
• Typical areas of application are the assembly of fittings, cassette walls or edge parts on insulation panels in industrial and hall construction.
• the sheets to be joined have a thickness of 0.1 mm to about 3 mm, typically about 0.75 mm.
• WO 95/05255 shows a device for producing a rivet connection with pneumatically driven means for shooting a rivet through workpieces to be connected and pneumatically driven means for subsequently pulling the rivet.
• the means for shooting the rivet act on the stop head of the rivet sleeve using a conically tapering, hollow-cylindrical driving-in part.
• the rivet mandrel is guided through an opening in the stop surface of the driving part facing the stop head of the rivet into the interior of the driving part and is gripped there by the means for pulling the rivet arranged behind the driving part in the weft direction. Due to the
• Arranging the means for pulling the rivet within the hollow cylindrical volume formed by the means for shooting the rivet means that the design effort for such a device is high; in particular, the reliable operation of such a device requires the use of high-quality materials and less compliance
• the present invention is therefore based on the problem of providing a device for producing a riveted connection which can be produced inexpensively and which ensures reliable operation.
• the design effort for the provision of means for pulling and means for shooting the rivet should be as low as possible, in particular a realization with a small size should be possible.
• a rivet that can be processed with this device is to be provided.
• the problem is solved by the device disclosed in claim 1.
• a suitable rivet is disclosed in claim 10.
• Special embodiments of the invention are disclosed in the subclaims.
• the problem is solved in a device according to claim 1 in that the means for driving in or shooting the rivet act on the mandrel.
• the means for pulling the rivet can advantageously engage the rivet mandrel in the firing direction before the means for shooting the rivet.
• the constructive design leeway for realizing the means for pulling the rivet is thereby larger and a corresponding device can be made small and easy.
• Shooting the rivet under the action of the rivet mandrel also increases the reliability of the rivet connection produced, since the workpieces to be connected are reliably pierced is guaranteed by means of the rivet mandrel.
• the means for shooting and means for pulling the rivet can be driven pneumatically, hydraulically, magnetically, electrically, piezoelectrically or using an explosive
• the device according to claim 2 has the advantage that by "interposing" a cylindrical impact piece between the
• the striking piece can have a first section, the diameter of which is adapted to the diameter of the firing channel, and a second section, the smaller diameter of which is adapted to the diameter of the rivet mandrel, in particular about one to 1.5 times the diameter of the rivet mandrel.
• the device according to claim 3 has the advantage that the reliability of the shooting process is further increased by the trough-shaped centering device, which is adapted to the end of the rivet mandrel facing the impact piece. In particular, this is also common Desired right-angled alignment of the rivet mandrel with respect to the workpieces to be connected and a corresponding guidance of the rivet during the shooting process.
• the device according to claim 4 has the advantage that the striking piece already bears on the rivet mandrel when the shooting bolt strikes the striking piece. This reliably prevents damage, in particular bending, of the rivet mandrel and of the striker due to the striking of the striker on the rivet mandrel. This also prevents the torn rivet mandrel from falling into the firing channel and the device can be operated in any position, in particular rivets can also be set vertically upwards.
• the device according to claim 5 has the advantage that the movement of the striker at the end of the shooting process is gently braked by the elastic buffer element and in particular does not strike the end of the preferably metallic firing channel. This significantly increases the service life of the device.
• the buffer element preferably abuts an annular shoulder at the end of the weft channel, which is formed by an opening in the weft channel, and can be designed, for example, as a helical spring, plate spring or rubber or plastic disk.
• the device according to claim 6 has the advantage that by the two-part design of the shot channel by a hollow piston and a connecting piece, which are preferably screwed together, the shot channel is easily accessible and in particular the striking piece can be replaced if necessary.
• the device according to claim 7 has the advantage that the end piece not only guides the rivet mandrel during the shooting and Pulling takes place, but that the end piece simultaneously ensures a spreading of the jaws during the shooting process and thus a smooth passage of the rivet mandrel and possibly the striking piece through the clamping jaws is ensured during the shooting process. At the same time, damage to the clamping jaws by the rivet mandrel and possibly the striking piece during the shooting process is reliably prevented. In addition, the spreading of the clamping jaws simplifies the insertion of a new rivet.
• the second elastic element can be designed as a coil spring. As an alternative to this, for example, a plate spring or a rubber or plastic disc can be considered.
• the device according to claim 8 has the advantage that pulling the rivet mandrel by pressurizing the piston against the force of an elastic element, preferably a coil spring with a high spring constant, results in a reliable pulling of the piston, connecting piece and clamping sleeve connected, preferably screwed together Rivets and thus a reliable production of the rivet connection is guaranteed.
• Pressure is preferably applied using hydraulic pressure to provide the high forces required.
• the device according to claim 9 has the advantage that the device requires only one supply connection, namely a compressed air connection.
• the hydraulic pressure is provided via a pneumatic / hydraulic pressure converter.
• the rivet is fired pneumatically, the rivet is pulled hydraulically.
• the entire riveting process with shooting and pulling is controlled by a three-stage pneumatic switching element.
• the pneumatic / hydraulic pressure converter like the quick exhaust valve, is preferably accommodated in a handle of the device.
• a rivet according to claim 10 is provided for use in the device according to the invention. It is advantageous that the rivet sleeve is firmly connected to the rivet mandrel, preferably is pressed. This ensures that the rivet mandrel does not, or at least not significantly, relative to that, particularly during the shooting process
• Rivet shaft moves This is particularly advantageous when using the rivet in a device according to the invention, since in the device according to the invention the means for shooting the rivet act on the rivet mandrel.
• the rivet mandrel preferably consists of steel or stainless steel.
• the Niethulse can also consist of steel or stainless steel or alternatively an aluminum or copper alloy
• the rivet according to claim 1 1 has the advantage that the shaping of a tip allows penetration of the workpieces even with low shooting energies.
• the tip can be conical or arbitrarily ogival, in particular the tip can also have one or more cutting edges
• Point angle is preferably in a range from 30 ° to 60 °
• the rivet according to claim 1 2 has the advantage that a total of four cutting edges are provided by the pyramid-shaped formation of the rivet mandrel, which simplify the penetration of the workpieces
• the rivet according to claim 1 3 has the advantage that a secure interaction with the centering device on the impact piece is ensured by the likewise tapering second end of the rivet mandrel.
• An embodiment of the second end in the form of a pyramid is advantageously obtained by appropriately separating a rivet mandrel from a rod-shaped starting material
• the rivet according to claim 14 has the advantage that by providing hooking means directed towards the tip of the rivet Relative movement of the rivet mandrel with respect to the rivet sleeve is reliably prevented, in particular when the rivet is being fired.
• the hooking means can be realized, for example, by radially projecting mandrels distributed over the circumference of the rivet mandrel or by truncated cone-shaped partial sections of the rivet mandrel which are arranged in the axial direction and produced by rolling.
• FIG. 1 shows a section through the head part of the device according to the invention
• FIG. 2 shows a section through the handle of the device according to the invention
• FIG. 3 shows a schematic and partially sectioned overall view of the device according to the invention.
• FIG. 1 shows a section through the head part of the device according to the invention, which is responsible for the shooting and pulling of the rivet.
• the housing 1 of the device On the right edge of the picture, the housing 1 of the device is shown, onto which the first cylinder 22 is screwed by means of cylinder screws 6 and washers 23 using a sealing first O-ring 2 and a support washer 24.
• the pneumatic cylinder 58 with the firing pin 25 and the first buffer 50 is also shown on the right edge of the figure.
• the firing channel 70 extends in the axial extension of the firing pin 25 and is through the centering piece 45, the hollow piston 20 and the connector 1 8 formed.
• the piston 20 is screwed to the connecting piece 18 and connected to the centering piece 45 by a close clearance fit and under the action of the third coil spring 8 designed as a third elastic element.
• the piston 20 is biased in the direction of the rivet 14 shown on the left edge of the picture by means of the third helical spring 8, which is supported on the support disk 24 at one end and is supported
• the piston 20 is guided and sealed in the first cylinder 22 by a guide ring 13 and a first seal combination 1 2.
• hydraulic oil is supplied via an annular groove and corresponding bores in the first guide bushing 26 past a retaining ring 5 into the hollow cylindrical volume between the first cylinder 22 and the piston 20, and the piston 20 is against the action of the third with a corresponding pressurization of, for example, 200 bar Coil spring 8 slidable in the first cylinder 22.
• Another hydraulic connection of the first cylinder 22 is blindly stuffed by the first screw 56.
• the piston 20 is again guided and sealed by a second seal combination 11 and an axially adjacent third O-ring 10 at the rivet-side end of the first cylinder 22.
• the seal combinations 1 1, 1 2, 35 are in several parts and have a plastic part with a sealing lip and an underlying O-ring.
• the piston 20 is screwed to the connector 18 using a lock nut 19.
• an impact piece 21 is guided, which is biased in the direction of the rivet 14 by the first coil spring 51 designed as a first elastic element.
• the first coil spring 51 is supported in the direction of the housing 1 on a piston 20 formed in the firing channel annular shoulder and is supported in the direction of the rivet 14 on the striking piece 21.
• the striking piece 21 At its end facing the first helical spring 51, the striking piece 21 also has an annular shoulder on which the first helical spring 51 is supported by forming a cylindrical extension with a smaller diameter.
• the striking piece 21 can be formed in one or more pieces, in particular in two pieces.
• the striking piece 21 can consist of a sleeve and a mandrel inserted in the sleeve and firmly connected to it, which mandrel has a smaller diameter, a greater length and a higher modulus of elasticity and / or greater hardness.
• the fixed connection between the sleeve and the mandrel can be made, for example, by welding, pressing or gluing.
• the diameter of the sleeve is adapted to the diameter of the shot channel 70, while the diameter of the mandrel is adapted to the diameter of the rivet mandrel 14b.
• the striking piece 21 lies against a buffer element 49 arranged at the end of the firing channel 70.
• the shot channel 70 is open through a bore in the connecting piece 18 to the rivet 14, the striking piece 21 in the illustrated embodiment having a first section 21 a, the diameter of which is adapted to the diameter of the shooting channel 70 and by means of which the striking piece 21 is guided in the shot channel 70 is, and has a second portion 21 b, the smaller diameter is adapted to the diameter of the bore in the connector 18 or to the diameter of the rivet mandrel 14b.
• the connecting piece 18 is sealed and guided within a guide sleeve 16 screwed to the first cylinder 22 by a second O-ring 9 inserted into an annular groove.
• a clamping sleeve 4 is also screwed, which comprises clamping jaws 3 arranged around the rivet mandrel 14b and is also guided in the guide sleeve 16.
• the clamping jaws 3 are at their end facing the housing 1 by means of a pressure sleeve 17 which, under the action of a pressure sleeve 17, and the connecting piece 18 arranged second coil spring 7 is biased in the direction of the rivet 14, and spread at its end facing the rivet 14 by means of an end piece 15 screwed into the guide sleeve 16 1 7 or the end piece 1 5
• the second section 21 b of the striking piece 21 protrudes in the position shown through the bore of the connecting piece 18 and a bore in the pressure sleeve 17 to between the clamping jaws 3 and lies against it
• Rivet mandrel 14b of the rivet 14 on The second section 21b has at its end facing the rivet mandrel 14b a trough-shaped depression as a centering device for the rivet mandrel 14b
• the guide sleeve 1 6 is surrounded by a centering sleeve 54 which has an opening aligned with the bore in the end piece 15 for receiving the rivet mandrel 14b.
• the centering sleeve 54 is firmly connected via first screws 52 and to the centering sleeve 54 or the second linkage 57 , preferably welded, nuts 53 connected to a first linkage 55 and a second linkage 57, which acts on a switching element of the device in such a way that the shooting process can only be triggered when the centering sleeve 54 is applied to the device by applying a corresponding riveting force 14 to the workpieces to be connected and to the centering sleeve 54 is pushed axially in the direction of the housing 1 over the guide sleeve 16 and bears against it.
• This increases the risk of injury from shooting a rivet without appropriate attachment to a workpiece as well Shooting empty and the associated risk of damage to the device effectively minimized.
• FIG. 2 shows a section through the handle 71 of the device according to the invention.
• the device is supplied with compressed air of, for example, 7 bar via the compressed air connection 68.
• the firing and pulling process is controlled by a pneumatic switching element comprising the firing valve 59, the pulling valve 60 and the trigger 61.
• the pneumatic / hydraulic pressure transducer active during the pulling of the rivet is acted upon by compressed air via a connection (not shown) between the pull valve 60 and the input connection 67 in the cover 34.
• the connection can be realized, for example, via compressed air hoses guided outside the handle or via compressed air hoses or compressed air channels guided inside the handle.
• the cover 34 further includes a quick vent valve which includes a slidable seal 48 and an insert 46 sealed by means of a ninth O-ring 64 and having an axial bore.
• a sieve 47 secured with a second locking ring 63 is provided on the output side of the quick vent valve to prevent contamination of the quick vent valve.
• a connection of the quick exhaust valve is connected via a bore in the cover 34 to the second cylinder 32 of the pneumatic / hydraulic pressure converter.
• the cover 34 is connected to the second cylinder 32 using a sealing flange 33 screwed to it and seventh and eighth O-rings 39 and 62.
• a pneumatic piston 31 is arranged inside the second cylinder 32 and is sealed against the wall of the second cylinder 32 by means of a sixth O-ring 38 inserted in an annular groove. With the pneumatic piston 31, a piston rod 27 is connected, the under Use of a third seal combination 35 and a fifth O-ring 37 passes through a flange 30 and enters a cavity 66 filled with a hydraulic fluid. The piston rod 27 is also guided through a guide bushing 29 arranged between the guide flange 30 and the handle 71.
• Pressure guidance on the hydraulic side can in turn be realized, for example, by pressure lines routed outside the handle or the device or by pressure lines or pressure channels routed inside the device.
• the guide flange 30 is tightly screwed to the handle 71 using a fourth O-ring 36 by means of second screws 40. At the same time, the flange 30 is screwed to the second cylinder 32 by an external thread.
• the flange 30 has a ventilation opening 74.
• An annular second buffer 44 is also provided on the flange 30 for buffering the pneumatic piston 31 during an upward movement.
• the stop head 14e of the rivet sleeve 14a comes into contact with the centering sleeve 54 and pushes it further in the direction of the guide sleeve 16, as a result of which the pneumatic switching element 59, 60, 61 is unlocked via the first and second linkages 55, 57.
• the shooting bolt 25 When the first switching stage is actuated, the shooting bolt 25 is thrown forward and strikes the striking piece 21, which acts on the rivet mandrel 14b and shoots the rivet 14 into the workpieces to be connected.
• the forward movement of the impact piece 21 is buffered by the buffer element 49 within the firing channel 70.
• the hydraulic pressure acts on the piston 20 and presses it against the force of the third coil spring 8 in the direction of the housing 1. This also pulls the clamping sleeve 4 in the direction of the housing 1 and the clamping jaws 3 firmly grip the rivet mandrel 14b and tear it to the rear a predetermined breaking point.
• the inlet connection 67 shown in FIG. 2 is depressurized, as a result of which the seal 48 falls off the insert 46 and releases the path of the compressed air from the second cylinder 32 through the insert 46 and the sieve 47 to the environment.
• the second cylinder 32 is thereby depressurized.
• the piston 20 Under the action of the third coil spring 8, the piston 20 is in its initial position in Pressed in the direction of the rivet 14 and moved by the hydraulic connection via the hydraulic connection 69 and the output connection 65, the piston rod 27 and thus the pneumatic piston 31 back to its lower starting position.
• the torn rivet mandrel 14b is ejected forward by the clamping sleeve 4 and the guide sleeve 16 by the movement of the piston 20 in the direction of the rivet 14 by means of the second section 21b of the striking piece 21.
• the device is now ready to insert a new rivet and to re-establish a rivet connection.
• the mechanics of the pneumatic switching element 59, 60, 61 and of the second linkage 57 that is operatively connected to it is designed so that the firing pin 25 preferably returns to its starting position after a shot and a multiple triggering of the pulling process is possible without an intermediate shooting process as long as the machine has not been lifted from the workpieces to be connected. This advantageously allows multiple rivets to be pulled in and thus increases the overall reliability and operational safety of the device.
• FIG. 3 shows a schematic and partially sectioned overall view of the device according to the invention.
• the position of the rivet 14 shown in relation to the centering sleeve 54 and thus on the head of the device corresponds to the illustration in FIG. 1.
• the position of the pneumatic piston 31 in the handle 71 corresponds to the illustration in FIG.
• the hydraulic pressure line 73 is shown by a dash-dotted line between the output port 65 and the hydraulic port 69.
• Fig. 4 shows a rivet for use in the device according to the invention.
• the rivet 14 is constructed in two parts and has a rivet sleeve 14a and a rivet mandrel 14b.
• the rivet mandrel 14b is provided with a tip 14c and with cutting edges 14d at its first end directed towards the workpieces to be connected.
• a pyramid-shaped first end of the rivet mandrel 14b has proven to be particularly advantageous, as a result of which four cutting edges 14d are formed in total forms.
• the rivet mandrel 14b is also preferably pyramid-shaped in order to ensure reliable centering with respect to the impact piece 21
• the rivet mandrel 14b together with the rivet pulse 14a is driven into the workpieces to be joined until the stop head 14e bears against one of the workpieces to be joined.
• hooking means directed onto the tip 14c of the rivet 14. can be formed, for example, by sawtooth-shaped, rolled-in annular grooves, the sawtooth shape being oriented such that the rivet dome 14b gets caught in the rivet pulse when the rivet 14 is fired.
• the rivet sleeve 14a is firmly connected to the rivet mandrel 14b, for example firmly pressed, soldered, glued or welded to the rivet mandrel 14b.
• the rivet mandrel 14b has a predetermined breaking point 14f in the region of the rivet sleeve 14a, at which the rivet mandrel 14b tears when the rivet 14 is pulled.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Insertion Pins And Rivets (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=7870663

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (19)

Citations (6)

Family Cites Families (4)

• 1998
  • 1998-06-12 DE DE19826157A patent/DE19826157A1/de not_active Withdrawn
• 1999
  • 1999-06-04 WO PCT/EP1999/003862 patent/WO1999065629A1/de not_active Ceased
  • 1999-06-04 JP JP2000554494A patent/JP4472871B2/ja not_active Expired - Fee Related
  • 1999-06-04 US US09/719,009 patent/US6834420B1/en not_active Expired - Fee Related
  • 1999-06-04 EP EP99927868A patent/EP1085952B1/de not_active Expired - Lifetime
  • 1999-06-04 DE DE59903030T patent/DE59903030D1/de not_active Expired - Lifetime

Patent Citations (6)

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