EP2093024B1 - Electro-hydraulic device with an electronic control for deforming fastening elements - Google Patents
Electro-hydraulic device with an electronic control for deforming fastening elements Download PDFInfo
- Publication number
- EP2093024B1 EP2093024B1 EP08101965A EP08101965A EP2093024B1 EP 2093024 B1 EP2093024 B1 EP 2093024B1 EP 08101965 A EP08101965 A EP 08101965A EP 08101965 A EP08101965 A EP 08101965A EP 2093024 B1 EP2093024 B1 EP 2093024B1
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- EP
- European Patent Office
- Prior art keywords
- micro
- motor
- rod
- rivet
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000012530 fluid Substances 0.000 claims abstract description 20
- 210000000056 organ Anatomy 0.000 claims abstract description 13
- 230000003213 activating effect Effects 0.000 claims abstract description 9
- 230000004913 activation Effects 0.000 claims abstract description 5
- 230000009849 deactivation Effects 0.000 claims abstract 2
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
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
- B21J15/20—Drives for riveting machines; Transmission means therefor operated by hydraulic or liquid pressure
-
- 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
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/0007—Tools for fixing internally screw-threaded tubular fasteners
- B25B27/0014—Tools for fixing internally screw-threaded tubular fasteners motor-driven
-
- 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
- Y10T29/53739—Pneumatic- or fluid-actuated tool
- Y10T29/53743—Liquid
Definitions
- the invention relates to the technical sector of riveting pistols, with special reference to servo-assisted pistols, used for rivets having a cylindrical shape, a partially-threaded axial hole, an abutment collar at a head thereof and a specially-weakened portion at which the plastic deformation will occur.
- the rivets are destined to join two walls stably, for example in place of spot-welding, or for constituting a threaded anchoring bush of an adequate sturdiness, for structures made of too-soft or too-thin materials for fashioning sufficiently-resistant threads.
- a known-type riveting pistol constructed by the same applicant in accordance with an Italian patent application for industrial invention no. BO2007A000311 (family member of WO 2008/132576 ), comprises a body and a grip wherein are housed:
- Document FR2.779.670 discloses an electro-hydraulic pistol device according to the preamble of claim 1.
- the aim of the present invention is to provide an electro-hydraulic pistol device having an electronic control for deforming the fastening element, which therefore does not require a connection with a source of compressed air.
- a further aim of the invention is to provide an electro-hydraulic pistol device which exhibits an operating logic which is entirely similar to that of the known pistol described in the preamble hereto.
- a further aim of the invention relates to the desire to provide an electro-hydraulic pistol device which can be realised in numerous variant embodiments, different in the type of electrical supply provided and/or in the constructive design, with components that can be housed in the body and the grip, or that can be external thereof.
- a further aim of the invention consists in the possibility of offering versions of the electro-hydraulic pistol device which are particularly compact and light, thanks to the external location of components.
- 100 denotes a first embodiment of the electro-hydraulic pistol device of the invention, in its entirety; in the following description, for the sake of simplicity, the device 100 will be known simply as a pistol.
- the pistol 100 comprises a body 101 and a grip 102 in which the following are housed:
- the pistol 100 further comprises an emergency button control, not illustrated in detail but preferably arranged with a position and/or conformation protected from accidental activation, associated to the electric circuit 6 and destined to activate the second micro-motor 1 such that the rod 2 rotates to the left, in a way which will be described herein below.
- an emergency button control not illustrated in detail but preferably arranged with a position and/or conformation protected from accidental activation, associated to the electric circuit 6 and destined to activate the second micro-motor 1 such that the rod 2 rotates to the left, in a way which will be described herein below.
- the first transmission organs 11 are constituted, for example, by a plurality of gears also functioning as speed reducer; preferably these organs 11 cause the second micro-motor 1 and the rod 2 to rotate in a same direction ( figures 2 and 3 ).
- the second transmission organs 52 are constituted, for example, by an epicyclical gear reducer.
- the rivet 3 is arranged in the hole in the wall P therefor, with the relative collar 3B striking against the wall; or, alternatively, the rivet 3 is manually positioned before the rod 2 of the pistol 100 (see figure 4 ).
- the rod 2 is inserted into the axial hole 3A of the rivet 3 up to the start of the threading thereof, thus determining an axial thrust on the threaded rod 2, towards the body 101 of the pistol 100, which causes activation of the first micro-switch 61; the closing of the contact therein provides the signal to the control unit 60 to activate the second micro-motor 1 in a suitable direction, rotating the rod 2 in right-wise rotation in order to screw up the rivet 3.
- the second micro-switch 62 is activated and the control unit 60 starts up the automatic operating cycle of the pistol 100 ( figure 6 ).
- the first micro-motor 5 is then activated in the suitable direction, in order to determine the outward run of the piston 50 in the cylinder 51, with a consequent increase in the pressure of the hydraulic fluid F into the chamber 41 of the cursor 40 ( figure 7 ).
- the increase in the pressure in the hydraulic system 4 increases the resistance to rising of the piston 50, which leads to a proportional increase in the absorption of power on the part of the first micro-motor 5.
- the maximum peak of absorption the first micro-motor 5 has to reach is calculated and the relative datum is stored in the control unit 60.
- control unit 60 Inverts the rotation of the first micro-motor 5, with consequent inversion of the movement of the piston 50 ( figure 9 ).
- the control unit 60 in a suitable phase relation with the descent of the piston 50, starts up the second micro-motor 1 too, setting the threaded rod 2 in leftwise rotation so that it unscrews from the rivet 3 which by now is blocked to the wall P ( figure 10 ).
- the first micro-motor 5 is maintained in motion until the piston 50 reaches the lowered start position, after which it is automatically deactivated by the control unit 60 (see figure 10 once more); the signal which attests to the reaching of the position can be given by an end-run sensor (not illustrated), or by the increase of absorption of the first micro-motor 5 consequent upon the intercepting of a mechanical end-run stop 53 which is integral with the piston 50.
- a particularly able operator therefore, can optimally synchronise the disengagement of the rod 2 with the halting of the second micro-motor 1, such as to render the pistol 100 immediately ready for another rivet 3, previously positioned on the wall P.
- the unscrewing can be completed by pressing the emergency command, in order to reactivate the second micro-motor 1 with a further left-wise rotation of the rod 2.
- control logic of the control unit 60 can be programmed to continue the interrupted cycle if, for example, release occurs during the stage of deformation of the rivet 3.
- the pistol repeats the automatic traction cycle on the rod 2 without causing undesired stress on the rivet 3 applied, as on reaching the preceding maximum fluid pressure F, the control unit 60 interrupts the action and starts unscrewing, so that the only drawback that obtains is a slight waste of time.
- the batteries 7 and possibly also the control unit 60 can be housed in a module which is external of the body of the pistol; this is to contain the weight and size of the pistol, making it easier to use.
- the batteries are eliminated and electrical energy is sourced from a network, with the interposing of a suitable transformer/rectifier, with the aim of obtaining unlimited working autonomy, together (in this case too) with a considerable reduction in weight.
- the constructional characteristics of the two above-mentioned embodiments are combined, thus providing a module which is external of the body of the pistol which contains, apart from the batteries and the control unit, the transformer/rectifier for network-sourced power and possibly a device for recharging the batteries.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Fluid-Pressure Circuits (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Clamps And Clips (AREA)
- Manufacturing Of Electrical Connectors (AREA)
- Manipulator (AREA)
- Servomotors (AREA)
- Connection Of Plates (AREA)
- Actuator (AREA)
- Regulating Braking Force (AREA)
- Surgical Instruments (AREA)
Abstract
Description
- The invention relates to the technical sector of riveting pistols, with special reference to servo-assisted pistols, used for rivets having a cylindrical shape, a partially-threaded axial hole, an abutment collar at a head thereof and a specially-weakened portion at which the plastic deformation will occur.
- The rivets are destined to join two walls stably, for example in place of spot-welding, or for constituting a threaded anchoring bush of an adequate sturdiness, for structures made of too-soft or too-thin materials for fashioning sufficiently-resistant threads.
- The above-described rivets can be of considerable dimensions, and for their application it is necessary to avail of the necessary equipment, which must be able to exert thereon a high compression force.
- A known-type riveting pistol, constructed by the same applicant in accordance with an Italian patent application for industrial invention no.
BO2007A000311 WO 2008/132576 ), comprises a body and a grip wherein are housed: - a pneumatic motor, for rotating a threaded rod either right-wise or left-wise, respectively for engaging or disengaging the rod from the threaded axial hole of one of the rivets;
- a hydraulic system for impressing an axial translation on the motor-rod group, for causing plastic deformation of a predetermined portion of the rivet, such as to block the rivet to a structure;
- a pneumatic thrust amplifier, activating a piston for compressing the fluid of the hydraulic system;
- a pneumatic system, in which are comprised: an auxiliary valve activated to open by the rod; a main valve, activated to open by a trigger;
- a hydro-pneumatic exchange valve, connected to the hydraulic and pneumatic systems, comprising: first organs for detecting a pressure of the hydraulic fluid; second organs for switching delivery of compressed air from the pneumatic thrust amplifier to the pneumatic motor, upon reaching a predetermined maximum pressure of the hydraulic fluid;
- an emergency control for setting the pneumatic motor in left-wise rotation.
- The pistol functions as follows:
- the rivet is arranged in the hole afforded for it in the structure, with the relative collar contacting thereon, or, alternatively, the rivet is manually positioned before the rod of the pistol;
- the rod is placed in the axial hole of the rivet, up to the start of the thread thereof, thus determining an axial thrust on the rod towards the body of the pistol, which causes the opening of the auxiliary valve, which auxiliary valve enables compressed air to be sent to the motor, setting it in right-wise rotation in order to screw in the rivet; when the collar thereof strikes against the front head of the body, the auxiliary valve is automatically closed and the motor stopped;
- by pressing the trigger the main valve is opened, which enables sending compressed air to the thrust amplifier, through the hydro-pneumatic exchange valve, with a consequent increase in pressure of the hydraulic fluid and a starting of the axial translation of the motor-rod group;
- by keeping the trigger pressed, the translation proceeds, causing a progressive compression of the rivet which is thus deformed in an external direction, in the weakened portion, defining an annular edge that adheres to the surface of the opposite structure to the structure on which the collar rests, thus determining the blocking of the rivet;
- still by keeping the trigger pressed, on reaching the maximum pressure determined for the hydraulic fluid, the second organs of the hydro-pneumatic exchange valve intervene and interrupt the inflow of compressed air towards the thrust amplifier and send it to the pneumatic motor, setting the motor in left-wise rotation; at the same time the air contained in the thrust amplifier is discharged to the outside;
- the left-wise rotation of the motor is transmitted to the threaded rod which unscrews from the rivet, now blocked to the structure;
- the operator releases the trigger when the rod is disengaged from the rivet. The riveting pistol described above functions excellently, but requires a compressed air source to which it can be collected; it cannot therefore be used when the air source is not available.
- Document
FR2.779.670 claim 1. - The aim of the present invention is to provide an electro-hydraulic pistol device having an electronic control for deforming the fastening element, which therefore does not require a connection with a source of compressed air.
- A further aim of the invention is to provide an electro-hydraulic pistol device which exhibits an operating logic which is entirely similar to that of the known pistol described in the preamble hereto.
- A further aim of the invention relates to the desire to provide an electro-hydraulic pistol device which can be realised in numerous variant embodiments, different in the type of electrical supply provided and/or in the constructive design, with components that can be housed in the body and the grip, or that can be external thereof.
- A further aim of the invention consists in the possibility of offering versions of the electro-hydraulic pistol device which are particularly compact and light, thanks to the external location of components.
- The characteristics of the invention will better emerge from the following description of preferred embodiments thereof, in agreement with what is set out in the appended claims and with the aid of the accompanying figures of the drawings, in which:
-
figure 1 illustrates an embodiment of the electro-hydraulic pistol device of the invention, in a sectioned schematic lateral view; -
figure 2 is a section made along plane II-II offigure 1 ; -
figure 3 is a section made along plane III-III offigure 1 ; -
figures 4 from 11 illustrates views similar tofigure 1 , with the electro-hydraulic device in the most important operating stages. - With reference to the figures of the drawings, 100 denotes a first embodiment of the electro-hydraulic pistol device of the invention, in its entirety; in the following description, for the sake of simplicity, the
device 100 will be known simply as a pistol. - The
pistol 100 comprises abody 101 and agrip 102 in which the following are housed: - a first
electric micro-motor 5, a secondelectric micro-motor 1 and ahydraulic system 4, the secondelectric micro-motor 1, for rotating leftwise or rightwise, viafirst transmission organs 11, a threadedrod 2, respectively for engaging or disengaging therod 2 in the threadedaxial hole 3A of one of therivets 3, thehydraulic system 4 comprising acylinder 51, containing a fluid F and connected to achamber 41, in which acursor 40 slides, the cursor impressing an axial translation to therod 2, in order to determine plastic deformation of a predetermined portion of therivet 3, such as to block it to a corresponding wall P, and the firstelectric micro-motor 5, for commanding, by means ofsecond transmission organs 52, an outward and return run of apiston 50, which compresses, during the outward run, the fluid F of thehydraulic system 4 in thecylinder 51; - an
electric circuit 6, comprising the following: acontrol unit 60; a first micro-switch 61, activated by therod 2 to switch the second micro-motor 1 such that therod 2 rotates towards the right; a second micro-switch 62 activated by atrigger 63, for activating thefirst micro-motor 5 first in one direction and then in the other and, in a phase relation determined by thecontrol unit 60, for activating thesecond micro-motor 1 in left-wise rotation; -
batteries 7, associated to an ON/OFF switch, not illustrated, for supplying electrical energy to theelectric circuit 6 and, via this, to the first and second micro-motor 5, 1. - The
pistol 100 further comprises an emergency button control, not illustrated in detail but preferably arranged with a position and/or conformation protected from accidental activation, associated to theelectric circuit 6 and destined to activate the second micro-motor 1 such that therod 2 rotates to the left, in a way which will be described herein below. - The
first transmission organs 11 are constituted, for example, by a plurality of gears also functioning as speed reducer; preferably theseorgans 11 cause the second micro-motor 1 and therod 2 to rotate in a same direction (figures 2 and 3 ). - The
second transmission organs 52 are constituted, for example, by an epicyclical gear reducer. - There follows a description of the operation of the
pistol 100 for application of arivet 3 to a wall P, starting from the inoperative position offigure 4 , in which: - the
first micro-motor 5 and the second micro-motor 1 are stationary; - the pressure in the
hydraulic system 4 is at the minimum, with thepiston 50 in the lowered position of thecylinder 51 and thecursor 40 advanced in thechamber 41, towards the front head 101 a of thebody 101, due to the action of arelative contrast spring 42; - the switch associated to the
batteries 7 is in the ON position. - The
rivet 3 is arranged in the hole in the wall P therefor, with therelative collar 3B striking against the wall; or, alternatively, therivet 3 is manually positioned before therod 2 of the pistol 100 (seefigure 4 ). - Similarly to the known riveter pistol, mentioned in the preamble hereto, the
rod 2 is inserted into theaxial hole 3A of therivet 3 up to the start of the threading thereof, thus determining an axial thrust on the threadedrod 2, towards thebody 101 of thepistol 100, which causes activation of thefirst micro-switch 61; the closing of the contact therein provides the signal to thecontrol unit 60 to activate thesecond micro-motor 1 in a suitable direction, rotating therod 2 in right-wise rotation in order to screw up therivet 3. - When the
collar 3B of therivet 3 strikes against thefront head 101A of thebody 100, therod 2 is recalled in an externalwise direction, releasing thefirst micro-switch 61 and thus causing thesecond micro-motor 1 to stop (figure 5 ). - By pressing the
trigger 63, the second micro-switch 62 is activated and thecontrol unit 60 starts up the automatic operating cycle of the pistol 100 (figure 6 ). - The first micro-motor 5 is then activated in the suitable direction, in order to determine the outward run of the
piston 50 in thecylinder 51, with a consequent increase in the pressure of the hydraulic fluid F into thechamber 41 of the cursor 40 (figure 7 ). - By keeping the trigger pressed 63, the
piston 50 continues to rise, while the pressurised fluid F overcomes the resistance of thecontrast spring 42 and pushes thecursor 40 to retreat, together with the associated threadedrod 2. - The translation continues, causing a progressive compression of the
rivet 3 which deforms towards the outside, in the weakened portion, to define anannular edge 3C adhering to the surface of the wall P opposite the surface on which thecollar 3B is resting, thus determining a blocking of the rivet 3 (figure 8 ). - The increase in the pressure in the
hydraulic system 4 increases the resistance to rising of thepiston 50, which leads to a proportional increase in the absorption of power on the part of the first micro-motor 5. - The value of this absorption is constantly monitored by the
control unit 60, since the force exerted on therod 2 to deform therivet 3 is calculated in relation thereto, by means of suitable parameters. - On the basis of the maximum force the pistol is to be calibrated for, the maximum peak of absorption the first micro-motor 5 has to reach is calculated and the relative datum is stored in the
control unit 60. - When the instantaneous absorption detected equals the maximum value foreseen, and with this the predetermined deformation thrust having been reached, the
control unit 60 inverts the rotation of thefirst micro-motor 5, with consequent inversion of the movement of the piston 50 (figure 9 ). - The above leads to a sharp drop in hydraulic fluid pressure F, with a consequent interruption of the retraction of the cursor-rod group and thus of the stressed on the
rivet 3. - While the
piston 50 proceeds in its descent, due to the action of thefirst micro-motor 5, thecontrast spring 42 newly prevails on the force determined by the fluid pressure F and advances thecursor 40 and therod 2. - The
control unit 60, in a suitable phase relation with the descent of thepiston 50, starts up the second micro-motor 1 too, setting the threadedrod 2 in leftwise rotation so that it unscrews from therivet 3 which by now is blocked to the wall P (figure 10 ). - The first micro-motor 5 is maintained in motion until the
piston 50 reaches the lowered start position, after which it is automatically deactivated by the control unit 60 (seefigure 10 once more); the signal which attests to the reaching of the position can be given by an end-run sensor (not illustrated), or by the increase of absorption of the first micro-motor 5 consequent upon the intercepting of a mechanical end-run stop 53 which is integral with thepiston 50. - The rotation of the
second micro-motor 1, on the other hand, continues as long as thetrigger 63 is kept depressed, such that the rotation of therod 2, for unscrewing the just-appliedrivet 3, proceeds for the time decided by the operator. - On release of the
trigger 63, with a consequent stop of the second micro-motor 1, the foreseen functioning program is completed (figure 11 ). - At this point the
pistol 100 is newly in the condition described with reference tofigure 4 , with thecontrol unit 60 predisposed for a new cycle. - A particularly able operator, therefore, can optimally synchronise the disengagement of the
rod 2 with the halting of thesecond micro-motor 1, such as to render thepistol 100 immediately ready for anotherrivet 3, previously positioned on the wall P. - If the
trigger 63, due to error or another reason, is released before the disengagement of therod 2, the unscrewing can be completed by pressing the emergency command, in order to reactivate thesecond micro-motor 1 with a further left-wise rotation of therod 2. - Worthy of note is the fact that the
pistol 100, as described, does not minimally suffer from any manoeuvring error which might be committed if, following an early release of thetrigger 63, pressure is newly placed thereon. - The control logic of the
control unit 60 can be programmed to continue the interrupted cycle if, for example, release occurs during the stage of deformation of therivet 3. - In a case where the manoeuvring error is in the final stage of unscrewing, with a subsequent pressure on the
trigger 63, instead of the activating of the emergency control, the pistol repeats the automatic traction cycle on therod 2 without causing undesired stress on therivet 3 applied, as on reaching the preceding maximum fluid pressure F, thecontrol unit 60 interrupts the action and starts unscrewing, so that the only drawback that obtains is a slight waste of time. - Other embodiments of the electro-hydraulic pistol device are envisaged, apart from the one illustrated and described herein above.
- In a second embodiment, not illustrated, the
batteries 7 and possibly also thecontrol unit 60 can be housed in a module which is external of the body of the pistol; this is to contain the weight and size of the pistol, making it easier to use. - In a third embodiment, also not illustrated, the batteries are eliminated and electrical energy is sourced from a network, with the interposing of a suitable transformer/rectifier, with the aim of obtaining unlimited working autonomy, together (in this case too) with a considerable reduction in weight.
- Certainly, with reference to the last solution, total device independence of external energy sources is lost, but it is extremely evident that having a current tap available is much more likely than having a handy source of compressed air.
- In a further embodiment, not illustrated, the constructional characteristics of the two above-mentioned embodiments are combined, thus providing a module which is external of the body of the pistol which contains, apart from the batteries and the control unit, the transformer/rectifier for network-sourced power and possibly a device for recharging the batteries.
- From the above it can be understood how the electro-hydraulic pistol device fully reaches the set aims, in particular for obtaining a functioning logic which is entirely similar to that of the known-type pistol cited in the preamble hereto, without there being any need for supply of compressed air.
- The constructional possibilities given by the choice of electrical workings means that it is easy to set up numerous constructional variations, without there being any negative effect on the functioning of the device, which variations can respond to needs that otherwise would be destined to remain unaddressed.
- Thanks to the external locating of the components such as the batteries, it is possible to attain considerable benefits in terms of compactness and lightness of the device, with obvious advantages in the use thereof.
Claims (15)
- An electro-hydraulic pistol device for deformation of fastening elements, of a type comprising:- a trigger (63), an electric circuit (6) and electrical energy supply means (7);- a threaded rod (2) which engages with a threaded axial hole (3A) of a rivet (3);- a hydraulic system (4) comprising means (40), associated to the threated rod (2), which impresses an axial translation on the threaded rod (2), by action of the hydraulic fluid (F) of the system (4), for determining a plastic deformation of a predetermined portion of the rivet (3) such as to block the rivet (3) to a corresponding wall (P);- a piston (50) located internally of a cylinder (50);- a first electric micro-motor (5), for controlling compression and discharge runs of said piston (50) located internally of said cylinder (51), so as to determine, respectively, a raising of the pressure of the fluid (F) of the hydraulic system (4), up to a maximum predetermined value, and a reduction of the pressure;the device being characterized in that- a second electric micro-motor (1) is provided for setting the threaded rod (2) in right-wise respectively left-wise rotation, for engaging respectively disengaging the threaded rod (2) from the threaded axial hole (3A) of the rivet;- said electrical circuit (6) is managed by an electronic control unit (60) and comprises a first micro-switch (61) which is activable via the rod (2) for activation of the second micro-motor (1), such that the rod (2) rotates in a rightwise direction, and a second micro-switch (62), activable by the trigger (63) after deactivation of the first micro-switch (61), for activating the first micro-motor (5) first in a direction causing the compression run of the piston (50) and then in another direction causing the discharge run of the piston (50) as well as for activating the second micro-motor (1) in phase relation with activation of said discharge run of the piston (50), such that the rod (2) rotates left-wise; and- said electrical energy supply means (7) are adapted to supply electrical energy to the electric circuit (6) and, through the circuit (6), to the first micro-motor (5) and the second micro-motor (1).
- The device of claim 1, characterised in that the means (40) associated to the rod (2) are constituted by a cursor which is slidably inserted in a chamber (41) and subjected at a side thereof to action of a contrast spring (42) and at another side thereof to action of the hydraulic fluid (F) of the system (4).
- The device of claim 1, characterised in that the control unit (60) is provided with means for instantaneously detecting absorption of power of the first micro-motor (5), and calculating means for relating a value of the absorption with the pressure of the hydraulic fluid (F).
- The device of claim 1, characterised in that first transmission organs (11) are interposed between the second micro-motor (1) and the threaded rod (2).
- The device of claim 4, characterised in that the first transmission organs (11) are constituted by a plurality of gears which reduce a number of rotations from an input to an output of the motion.
- The device of claim 1, characterised in that second transmission organs (52) are interposed between the first micro-motor (5) and the piston (50).
- The device of cairn 6, characterised in that the second transmission organs (52) are constituted by an epicyclical reducer.
- The device of claim 1, characterised in that a button-operated emergency command is included, associated to the electric circuit (6) and activating the second micro-motor (1) such that the rod (2) rotates left-wise.
- The device of claim 1, characterised in that a two-way switch is associated to the electric energy supply means (7), positions of the two-way switch being respectively for connecting and disconnecting the electric energy supply means (7) to and from the electrical circuit (6).
- The device of claim 1 or 9, characterised in that the electric energy supply means (7) are housed in the body (101) and the grip (102) of the device (100).
- The device of claim 1 or 9, characterised in that the electric energy supply means (7) are housed in a module which is external of the device (100).
- The device of claim 1 or 9 or 10 or 11, characterised in that the electric energy supply means (7) are constituted by batteries.
- The device of claim 1 or 9 or 10 or 11, characterised in that the electric energy supply means (7) are constituted by a transformer/rectifier which can be connected to an external electricity source line.
- The device of claim 1, characterised in that the control unit (60) is housed in the body (101) and the grip (102) of the device (100).
- The device of claim 1, characterised in that the control unit (60) is housed in a module which is external of the device (100).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000117A ITBO20080117A1 (en) | 2008-02-21 | 2008-02-21 | ELECTRO-HYDRAULIC PISTOL DEVICE WITH ELECTRONIC CONTROL FOR THE DEFORMATION OF FIXING ELEMENTS |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2093024A1 EP2093024A1 (en) | 2009-08-26 |
EP2093024B1 true EP2093024B1 (en) | 2010-09-22 |
Family
ID=40291438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08101965A Active EP2093024B1 (en) | 2008-02-21 | 2008-02-25 | Electro-hydraulic device with an electronic control for deforming fastening elements |
Country Status (8)
Country | Link |
---|---|
US (1) | US20110271504A1 (en) |
EP (1) | EP2093024B1 (en) |
AT (1) | ATE482055T1 (en) |
BR (1) | BRPI0907795B1 (en) |
DE (1) | DE602008002698D1 (en) |
ES (1) | ES2353468T3 (en) |
IT (1) | ITBO20080117A1 (en) |
WO (1) | WO2009103695A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US11511403B2 (en) | 2020-12-07 | 2022-11-29 | Dubuis Et Cie S.A.S. | Joining tool for joining a deformable element to a workpiece |
EP4371681A1 (en) | 2022-11-17 | 2024-05-22 | Bollhoff Otalu S.A.S. | Setting device for a blind rivet nut |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US8205779B2 (en) * | 2009-07-23 | 2012-06-26 | Tyco Healthcare Group Lp | Surgical stapler with tactile feedback system |
DE102009040126A1 (en) * | 2009-09-04 | 2011-03-17 | Böllhoff Verbindungstechnik GmbH | Electromotive hydraulic drive and method for providing a defined hydraulic pressure and / or volume |
JP5674691B2 (en) * | 2012-02-23 | 2015-02-25 | 株式会社ロブテックス | Electric riveter |
ITBO20120276A1 (en) * | 2012-05-21 | 2013-11-22 | Ober S P A | ELECTRO-HYDRAULIC PISTOL DEVICE WITH ELECTRONIC CONTROL FOR THE DEFORMATION OF FIXING ELEMENTS |
EP2786843B1 (en) * | 2013-04-02 | 2019-09-25 | Dubuis et Cie S.A.S. | A battery powered crimping tool |
DE102013105703B4 (en) * | 2013-06-04 | 2015-05-21 | VVG-Befestigungstechnik GmbH & Co. KG | riveter |
TWI477331B (en) * | 2013-08-09 | 2015-03-21 | Tranmax Machinery Co Ltd | Electromotive pull nail gun with pre - tensioned nail and its operation method |
ITUB20150545A1 (en) | 2015-03-11 | 2016-09-11 | Ober S P A | SYSTEM FOR THE COUPLING / UN-COUPLING OF A THREADED TIE ROD WITH / FROM A TIE ROD HOLDER IN A GUN FOR THE DEFORMATION OF FIXING ELEMENTS, AND GUN OBTAINED WITH THIS SYSTEM |
US11673243B2 (en) * | 2018-09-05 | 2023-06-13 | Milwaukee Electric Tool Corporation | Blind rivet nut-setting tool |
JP7187339B2 (en) | 2019-01-30 | 2022-12-12 | ポップリベット・ファスナー株式会社 | Blind nut tightening device |
WO2021247876A1 (en) | 2020-06-03 | 2021-12-09 | Milwaukee Electric Tool Corporation | Rivet setting tool |
IT202100010556A1 (en) * | 2021-04-27 | 2022-10-27 | Ober S P A | PORTABLE EQUIPMENT |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2753072A (en) * | 1952-08-12 | 1956-07-03 | Thor Power Tool Co | Tool for installing tubular rivets |
JPH0475882A (en) * | 1990-07-13 | 1992-03-10 | Makita Corp | Motor driven tool |
DE4126602A1 (en) * | 1991-08-12 | 1993-02-18 | Gesipa Blindniettechnik | BLIND RIVET DEVICE |
DE19818756A1 (en) * | 1998-04-27 | 1999-11-04 | Honsel M H Beteiligungs Gmbh | Rivet setting tool |
DE19818757A1 (en) * | 1998-04-27 | 1999-11-04 | Honsel M H Beteiligungs Gmbh | Rivet setting tool |
FR2779670B1 (en) * | 1998-06-15 | 2000-08-04 | Jean Claude Joux | ELECTROPORTATIVE APPARATUS FOR TIGHTENING NUTS OR CRIMPING BLIND RIVET WITH ROD BREAKING |
GB9923266D0 (en) * | 1999-10-02 | 1999-12-08 | Textron Fastening Syst Ltd | Riveting apparatus |
ITBO20070311A1 (en) * | 2007-04-27 | 2008-10-28 | Ober S P A | PNEUMOIDRAULIC RIVETING GUN |
-
2008
- 2008-02-21 IT IT000117A patent/ITBO20080117A1/en unknown
- 2008-02-25 ES ES08101965T patent/ES2353468T3/en active Active
- 2008-02-25 EP EP08101965A patent/EP2093024B1/en active Active
- 2008-02-25 AT AT08101965T patent/ATE482055T1/en not_active IP Right Cessation
- 2008-02-25 DE DE602008002698T patent/DE602008002698D1/en active Active
-
2009
- 2009-02-17 WO PCT/EP2009/051839 patent/WO2009103695A1/en active Application Filing
- 2009-02-17 BR BRPI0907795A patent/BRPI0907795B1/en active IP Right Grant
- 2009-07-16 US US12/866,846 patent/US20110271504A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11511403B2 (en) | 2020-12-07 | 2022-11-29 | Dubuis Et Cie S.A.S. | Joining tool for joining a deformable element to a workpiece |
EP4371681A1 (en) | 2022-11-17 | 2024-05-22 | Bollhoff Otalu S.A.S. | Setting device for a blind rivet nut |
WO2024104644A1 (en) * | 2022-11-17 | 2024-05-23 | Bollhoff Otalu Sas | Setting device for a blind rivet nut |
Also Published As
Publication number | Publication date |
---|---|
DE602008002698D1 (en) | 2010-11-04 |
ITBO20080117A1 (en) | 2009-08-22 |
US20110271504A1 (en) | 2011-11-10 |
BRPI0907795B1 (en) | 2019-12-17 |
WO2009103695A1 (en) | 2009-08-27 |
ATE482055T1 (en) | 2010-10-15 |
ES2353468T3 (en) | 2011-03-02 |
EP2093024A1 (en) | 2009-08-26 |
BRPI0907795A2 (en) | 2015-07-14 |
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