CN101856713A - Electromagnetic riveting press suitable for large-diameter rivets and press riveting method thereof - Google Patents
Electromagnetic riveting press suitable for large-diameter rivets and press riveting method thereof Download PDFInfo
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- CN101856713A CN101856713A CN201010145387A CN201010145387A CN101856713A CN 101856713 A CN101856713 A CN 101856713A CN 201010145387 A CN201010145387 A CN 201010145387A CN 201010145387 A CN201010145387 A CN 201010145387A CN 101856713 A CN101856713 A CN 101856713A
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/12—Riveting machines with tools or tool parts having a movement additional to the feed movement, e.g. spin
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Abstract
The invention discloses an electromagnetic riveting press suitable for large-diameter rivets and a press riveting method thereof, and relates to an electromagnetic riveting press and a press riveting method thereof. A composite structure is riveted by adopting the large-diameter rivets, and the problem of interference quantity and higher electromagnetic riveting requirement operation level are difficultly controlled by adopting hammer riveting and press riveting. An upper riveting die and a stress wave modulator of an electromagnetic riveting gun are jointed or manufactured into a whole; the electromagnetic riveting gun is arranged on a slipway on a horizontal arm; a riveting gun stroke control power source is connected with a control box; the control box is connected with a charge control signal input end of a low-voltage electromagnetic riveting device and a high-voltage pulse generator; the high-voltage pulse generator is connected with a discharge control signal input end of the low-voltage electromagnetic riveting device; positive and negative output ends of discharge signals are connected with two ends of a coil of the electromagnetic riveting gun; and the riveting gun stroke control power source drives the electromagnetic riveting gun to move downwards, a capacitor bank is charged and discharged, and a driving plate is subjected to the axial downward pulse loading effect so that an extended part of a nail bar forms an upset head. The electromagnetic riveting press is used for riveting structural members by the large-diameter rivets.
Description
Technical field
The present invention relates to a kind of electromagnetic riveting press and riveting method thereof, belong to the riveting technology field.
Background technology
Riveted joint is a kind ofly to make a kind of MACHINERY JOINT of field extensive use at Aero-Space, automobile, electronic apparatus etc., and it mainly comprises hammering riveted joint, electromagnetic riveting and process form such as press.
The hammering riveted joint is the clinching method that a kind of quilt generally adopts.Utilize during riveted joint and impact the head that the continuous several times of strength hit rivet bar, rivet bar is radially flowed, the riveting that has formed union piece becomes head.The characteristics of hammering riveted joint are: the impulsive force that needs is bigger; Riveted parts and clincher tool have bigger vibrations; Rivet bar head discontinuity equalization, unstable product quality; Riveting becomes the head appearance of poor quality, has destroyed the institutional framework of rivet bar head material simultaneously; Big and the certain technology of GPRS of labor intensity of operating personnel; Noise is arranged, and working ability is not high, is difficult to realize the riveted joint of large-diameter rivets.When rivet bar to strain hardening and strain-rate sensitivity, carry out common hammer riveting as titanium alloy and add man-hour, TITAIUM ALLOY RIVETS produces cracking easily at the heading position, and riveting quality is very unstable.
Electromagnetic riveting is to utilize the stress wave pulse that produces based on pulse magnet field force that rivet nail club head is applied load one time, and the zero distance contact loads, and makes rivet bar produce Radial Flow and forms riveted joint.With respect to the hammering riveted joint, owing to be rivet distortion under two-forty loads, help improving rivet bar plasticity, can carry out the riveted joint of large-diameter rivets.Single load reduces labour intensity and noise, and is particularly suitable for the rivet bar of strain hardening and strain-rate sensitivity, as TITAIUM ALLOY RIVETS.In addition, electromagnetic riveting technological flexibility height is very suitable for that prologue property is poor, the unhandy working condition of the equipment that presses.Because the riveted joint process only is 1-10ms, therefore operating personnel's operant level is had relatively high expectations, otherwise quality is difficult for guaranteeing.
Pressing is a kind of clinching method that utilizes the static pressure jumping-up rivet bar formation heading of squeeze riveter generation.The riveting parts that presses has the advantages that surface quality is good, distortion is little, bonding strength is high.But, because the restriction of press device structure and prologue property generally is applicable to single nail riveted joint of structural edge riveted seam; The riveted joint of compact packages such as frame, beam, rib plane class is as aircraft flap class part; Profile is the riveted joint of single curvature structures part, as the wallboard of aircraft aerofoil class part etc.Therefore, in practical operation, as long as processability of product structure allows, usually preferential the employing presses.
Raising along with novel aerospace flight vehicle bearing capacity and flying distance requirement, the composite structure of composite and metal (aluminium alloy, titanium alloy etc.) is used more and more widely, therefore, must relate to two kinds of connectivity problems between the material, under existing technical matters condition, clinching method remains inevitable choice.Consider the problems such as biocompatibility between bonding strength, structure loss of weight and composite and the metal, inevitable choice high strength, large diameter titanium alloy or aluminium alloy rivet.But in the composite structure riveted joint, employing is hammered riveting into shape and is pressed, and makes composite produce defectives such as installation damage, layering easily, and is difficult to strict control amount of interference; Adopt electromagnetic riveting that operating personnel's operant level is had relatively high expectations.
Summary of the invention
The purpose of this invention is to provide a kind of electromagnetic riveting press and riveting method thereof that is applicable to large-diameter rivets, rivet with large-diameter rivets to solve composite structure, adopt the hammer riveting and press to make composite produce defectives such as installation damage, layering easily, and the problem that is difficult to strict control amount of interference and adopts electromagnetic riveting that operating personnel's operant level is had relatively high expectations.
The present invention solves the problems of the technologies described above the technical scheme of taking to be: a kind of electromagnetic riveting press of large-diameter rivets that is applicable to of the present invention is made up of bending shape upper arm, electromagnetism riveting gun, riveting gun Stroke Control power source, upper rivet model, lower rivet model, workbench, low-voltage electromagnetic riveter, control cabinet, spring compression device and base; The spring compression device is made up of spring and die sleeve; Bending shape upper arm is made up of the horizontal arm of making one and vertical arm, vertically the upper surface of the lower end of arm and base is affixed, the upper surface of base is provided with convex, workbench is packed on the convex, the coaxial successively from top to bottom setting of upper rivet model and lower rivet model, and lower rivet model is arranged on the workbench, die sleeve is sleeved on the upper rivet model and the two is slidingly matched, spring housing is contained on the upper rivet model, the lower surface of spring is arranged on the upper surface of die sleeve, the upper surface of upper rivet model reclines mutually with the lower surface of the stress wave modulator of electromagnetism riveting gun or makes one, vertically be provided with slideway on the horizontal arm, the electromagnetism riveting gun is installed on the slideway on the horizontal arm and with it and is slidingly matched, riveting gun Stroke Control power source is arranged on the electromagnetism riveting gun and the two removably connects, one in three control signal outputs of the control signal input of riveting gun Stroke Control power source and control cabinet is connected, an electromagnetic riveting charge switch break-make that is used to control low-voltage electromagnetic riveter in two of the residues in three control signal outputs of control cabinet, signal input part with the high-voltage pulse generator of low-voltage electromagnetic riveter of residue in three control signal outputs of control cabinet is connected, the signal output part of this high-voltage pulse generator is used to control the high-frequency thyratron transistor discharge switch break-make of low-voltage electromagnetic riveter, the discharge signal cathode output end of low-voltage electromagnetic riveter is connected with the top of the coil of electromagnetism riveting gun, the discharge signal cathode output end of low-voltage electromagnetic riveter is connected with the end of the coil of electromagnetism riveting gun, constitutes the discharge loop of low-voltage electromagnetic riveter thus.
A kind of riveting method of large-diameter rivets that is applicable to of the present invention is realized by following steps: one, according to the structural form selection upper rivet model and the lower rivet model of construction package to be riveted, rivet is selected major diameter TITAIUM ALLOY RIVETS or large diameter aluminium alloy rivet for use, the head of rivet is countersunk head or cup head shape, the diameter of major diameter TITAIUM ALLOY RIVETS is Ф 2-Ф 6mm, and the diameter of large diameter aluminium alloy rivet is Ф 4-Ф 10mm; Two, the upper surface of upper rivet model is reclined mutually with the lower surface of the stress wave modulator of electromagnetism riveting gun or make one, lower rivet model is placed on the workbench; Three, connect the riveting gun Stroke Control power source of electromagnetic riveting press, adjust the spacing between upper rivet model and the lower rivet model: at first the electromagnetism riveting gun is dropped to extreme lower position, adjust the position of workbench then, and by the nail bar of the thickness of interlayer of construction package to be riveted and rivet in advance the amount of stretching height sum record needed distance; Four, construction package to be riveted is placed on the lower rivet model and location, system rivet hole, Huo countersunk head nest or counterbore, removal burr and cleaning, rivet in the step 1 is placed in the rivet hole of construction package to be riveted, and again construction package to be riveted and lower rivet model are fixed; Five, during riveted joint, press the control button of the control cabinet of electromagnetic riveting press, riveting gun Stroke Control power source drives the electromagnetism riveting gun and moves down, at first, compress construction package to be riveted by the spring compression device, the electromagnetic riveting charge switch of the low-voltage electromagnetic riveter of the control cabinet closed electromagnetic squeeze riveter by electromagnetic riveting press, connection is by rectifier, power supply, the charge circuit of the low-voltage electromagnetic riveter that current-limiting resistance and capacitor group constitute, the capacitor group is charged, capacitance is 10000-140000 μ F, when charging finishes, disconnect the electromagnetic riveting charge switch of low-voltage electromagnetic riveter by the control cabinet of electromagnetic riveting press, cut off charge circuit; Produce the high-voltage pulse triggering high-frequency thyratron transistor discharge switch of 10-15kV by the control cabinet control high-voltage pulse generator of electromagnetic riveting press, make it closed, the discharge loop that conducting is made of the coil in capacitor group and the electromagnetism riveting gun, capacitor set discharge, discharge voltage is 300-1000V, driving chip on the electromagnetism riveting gun is subjected to axially downward impulse load effect, and amplify after upper rivet model acts on the rivet by the stress wave modulator on the electromagnetism riveting gun, make the nail bar extension of rivet form heading; Six, under the effect of riveting gun Stroke Control power source, the electromagnetism riveting gun drives upper rivet model and the reposition of spring compression device, finishes a riveted joint cyclic process, and a riveted joint used time of cyclic process is 2-10s.
The present invention has following beneficial effect: the present invention combines electromagnetic riveting with pressing, a kind of equipment that presses and method based on pulse magnet field force proposed, give full play to electromagnetic riveting and be suitable for compliance rate sensitivity material, the advantage that the pressure-riveting process riveting quality is high, made originally and realized by static pressure that the process of rivet distortion changed power into and loads riveted joint, improved the riveting quality stability of hand-held electromagnetic riveting on the one hand, on the other hand, solve riveting method and be difficult to carry out high strength, the problem of strain hardening and strain-rate sensitivity material rivet has improved riveted joint ability and technological flexibility.In addition, also can avoid adopting the generation of defectives such as composite installation damage that hammer riveting and general riveting method cause, layering, the riveted joint amount of interference is easy to obtain accurately control by suitable technological parameter.Therefore, the present invention is specially adapted to high strength, the large-diameter rivets riveted joint of small-sized, edge, simple curvature class formation spare.
Description of drawings
Fig. 1 is the overall structure front view of electromagnetic riveting press of the present invention, and Fig. 2 is the A portion enlarged drawing of Fig. 1.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 and Fig. 2 present embodiment is described, a kind of electromagnetic riveting press of large-diameter rivets that is applicable to of present embodiment is made up of bending shape upper arm 1, electromagnetism riveting gun 2, riveting gun Stroke Control power source 3, upper rivet model 4, lower rivet model 5, workbench 7, low-voltage electromagnetic riveter 8, control cabinet 10, spring compression device 11 and base 14; Spring compression device 11 is made up of spring 11-1 and die sleeve 11-2; Bending shape upper arm 1 is made up of horizontal arm 1-1 that makes one and vertical arm 1-2, vertically the upper surface of the lower end of arm 1-2 and base 14 is affixed, the upper surface of base 14 is provided with convex 14-1, workbench 7 is packed on the convex 14-1, the coaxial successively from top to bottom setting of upper rivet model 4 and lower rivet model 5, and lower rivet model 5 is arranged on the workbench 7, die sleeve 11-2 is sleeved on the upper rivet model 4 and the two is slidingly matched, spring 11-1 is sleeved on the upper rivet model 4, the lower surface of spring 11-1 is arranged on the upper surface of die sleeve 11-2 (when the electromagnetism riveting gun moves downward, the spring compression device at first contacts with construction package to be riveted, realization compresses), the upper surface of upper rivet model 4 reclines mutually with the lower surface of the stress wave modulator 2-1 of electromagnetism riveting gun 2 or makes one (being convenient for changing the riveting mould of various ways), vertically be provided with slideway on the horizontal arm 1-1, electromagnetism riveting gun 2 is installed on the slideway on the horizontal arm 1-1 and with it be slidingly matched (by the slideway guiding), riveting gun Stroke Control power source 3 is arranged on the electromagnetism riveting gun 2 and the two removably connects, one in three control signal outputs of the control signal input of riveting gun Stroke Control power source 3 and control cabinet 10 is connected, an electromagnetic riveting charge switch 8-1 break-make that is used to control low-voltage electromagnetic riveter 8 in two of the residues in three control signal outputs of control cabinet 10, signal input part with the high-voltage pulse generator 8-4 of low-voltage electromagnetic riveter 8 of residue in three control signal outputs of control cabinet 10 is connected, the signal output part of this high-voltage pulse generator 8-4 is used to control the high-frequency thyratron transistor discharge switch 8-3 break-make of low-voltage electromagnetic riveter 8, the discharge signal cathode output end of low-voltage electromagnetic riveter 8 is connected with the top of the coil 2-2 of electromagnetism riveting gun 2, the discharge signal cathode output end of low-voltage electromagnetic riveter 8 is connected with the end of the coil 2-2 of electromagnetism riveting gun 2, constitutes the discharge loop of low-voltage electromagnetic riveter 8 thus.
Bending shape upper arm 1 in the present embodiment will have enough rigidity, can bear the impact of electromagnetism riveting gun recoil in the electromagnetic riveting process, and general impulsive force is 10-1000N.The power that riveting gun Stroke Control power source provides the electromagnetism riveting gun to move up and down is realized the accurate control of position, and power mode can be pneumatic or hydraulic pressure etc.Electromagnetism riveting gun 2 in the present embodiment is a prior art.
The specific embodiment two: in conjunction with Fig. 1 present embodiment is described, the low-voltage electromagnetic riveter 8 of present embodiment is made up of electromagnetic riveting charge switch 8-1, capacitor group C, current-limiting resistance R, rectifier 8-2, high-frequency thyratron transistor discharge switch 8-3 and high-voltage pulse generator 8-4; The two ends of power supply are connected with two ac voltage inputs of rectifier 8-2 respectively, the dc voltage electrode output of rectifier 8-2 is connected with the end of current-limiting resistance R, the other end of current-limiting resistance R is connected with the end of electromagnetic riveting charge switch 8-1, the other end of electromagnetic riveting charge switch 8-1 is connected with the end of high-frequency thyratron transistor discharge switch 8-3 and the positive terminal of capacitor group C respectively, the other end of high-frequency thyratron transistor discharge switch 8-3 is the discharge signal cathode output end of low-voltage electromagnetic riveter 8, the negative pole end of the DC voltage cathode output end of rectifier 8-2 and capacitor group C all is connected with the discharge signal cathode output end of low-voltage electromagnetic riveter 8, and the signal output part of high-voltage pulse generator 8-4 is connected with the discharge control signal input (trigger electrode) of high-frequency thyratron transistor discharge switch 8-3.So be provided with, can realize to capacitor group C charging and discharge.Other is identical with the specific embodiment one.
The specific embodiment three, present embodiment is described in conjunction with Fig. 1, a kind of riveting method of large-diameter rivets that is applicable to of present embodiment is realized by following steps: one, according to the structural form selection upper rivet model 4 and the lower rivet model 5 of construction package 12 to be riveted, rivet 13 is selected major diameter TITAIUM ALLOY RIVETS or large diameter aluminium alloy rivet for use, the head of rivet 13 is countersunk head or cup head shape, the diameter of major diameter TITAIUM ALLOY RIVETS is Ф 2-Ф 6mm, and the diameter of large diameter aluminium alloy rivet is Ф 4-Ф 10mm; Two, the upper surface of upper rivet model 4 is reclined mutually with the lower surface of the stress wave modulator 2-1 of electromagnetism riveting gun 2 or make one, lower rivet model 5 is placed on the workbench 7; Three, connect the riveting gun Stroke Control power source 3 of electromagnetic riveting press, adjust the spacing between upper rivet model 4 and the lower rivet model 5: at first electromagnetism riveting gun 2 is dropped to extreme lower position, adjust the position of workbench 7 then, and by the nail bar of the thickness of interlayer of construction package 12 to be riveted and rivet 13 in advance the amount of stretching height sum record needed distance (generally between several millimeters to tens millimeters); Four, construction package 12 to be riveted is placed on the lower rivet model 5 and location, system rivet hole, Huo countersunk head nest or counterbore, removal burr and cleaning, rivet in the step 1 13 is placed in the rivet hole of construction package 12 to be riveted, and again that construction package 12 to be riveted is fixing with lower rivet model 5; Five, during riveted joint, press the control button of the control cabinet 10 of electromagnetic riveting press, riveting gun Stroke Control power source 3 drives electromagnetism riveting gun 2 and moves down, at first, compress construction package 12 to be riveted by spring compression device 11, the electromagnetic riveting charge switch 8-1 of the low-voltage electromagnetic riveter 8 of the control cabinet 10 closed electromagnetic squeeze riveters by electromagnetic riveting press, connection is by rectifier 8-2, power supply, the charge circuit of the low-voltage electromagnetic riveter 8 that current-limiting resistance R and capacitor group C constitute, capacitor group C is charged, capacitance is 10000-140000 μ F, when charging finishes, control cabinet 10 by electromagnetic riveting press disconnects the electromagnetic riveting charge switch 8-1 of low-voltage electromagnetic riveters 8, cuts off charge circuit; Produce the high-voltage pulse triggering high-frequency thyratron transistor discharge switch 8-3 of 10-15kV by the control cabinet 10 control high-voltage pulse generator 8-4 of electromagnetic riveting press, make it closed, the discharge loop that conducting is made of the coil 2-2 in capacitor group C and the electromagnetism riveting gun 2, capacitor group C discharge, discharge voltage is 300-1000V, driving chip 2-3 on the electromagnetism riveting gun 2 is subjected to axially downward impulse load effect, and amplify after upper rivet model 4 acts on the rivet 13 by the stress wave modulator 2-1 on the electromagnetism riveting gun 2, make the nail bar extension of rivet 13 form heading; Six, under 3 effects of riveting gun Stroke Control power source, electromagnetism riveting gun 2 drives upper rivet model 4 and 11 repositions of spring compression device, finishes a riveted joint cyclic process, and a riveted joint used time of cyclic process is 2-10s.
The specific embodiment four: in conjunction with Fig. 1 present embodiment is described, in the step 5 of present embodiment, before the control button of the control cabinet 10 of pressing electromagnetic riveting press, construction package to be riveted 12 surfaces should be kept axis normal with upper rivet model 4 and lower rivet model 5.So be provided with, to obtain the high-quality riveted joint.Other is identical with the specific embodiment three.
The specific embodiment five: the rivet 13 in the step 1 of present embodiment is selected major diameter 2A10 aluminium alloy rivet for use, and the diameter of large diameter aluminium alloy rivet is Ф 6mm; Capacitance in the step 5 is 88000 μ F, and discharge voltage is 380V, and the discharge loop inductance is 23 μ H.Heading diameter 8.6mm, heading height 3.2mm satisfies the technical standard requirement of heading diameter 8.7 ± 0.6mm, heading height 2.9 ± 0.5mm respectively.Other is identical with the specific embodiment three.
The specific embodiment six: the rivet 13 in the step 1 of present embodiment is selected major diameter 2A10 aluminium alloy rivet for use, and the diameter of large diameter aluminium alloy rivet is Ф 8mm; Capacitance in the step 5 is 132000 μ F, and discharge voltage is 380V, and the discharge loop inductance is 36 μ H.Heading diameter 11.5mm, heading height 3.9mm satisfies the technical standard requirement of heading diameter 11.6 ± 0.8mm, heading height 3.7 ± 0.5mm respectively.Other is identical with the specific embodiment three.
The specific embodiment seven: the rivet 13 in the step 1 of present embodiment is selected major diameter TA1 TITAIUM ALLOY RIVETS for use, and the diameter of major diameter TITAIUM ALLOY RIVETS is Ф 5mm; Capacitance in the step 5 is 44000 μ F, and discharge voltage is 600V, and the discharge loop inductance is 24 μ H.Heading diameter 7.7mm, heading height 2.4mm satisfies the technical standard requirement of heading diameter 7.5 ± 0.5mm, heading height 2.4 ± 0.5mm respectively.Other is identical with the specific embodiment three.
Embodiment: the large-diameter rivets that present embodiment uses is selected the titanium alloy large-diameter rivets for use, and titanium alloy is the strain hardening and strain-rate sensitivity material, and promptly its plastic history only could obtain enough deformation extents in certain strain rate scope.At present, titanium alloy is that novel aerospace flight vehicle is made one of necessary rivet bar, considers that common hammer riveting carries out TITAIUM ALLOY RIVETS riveted joint existing problems, and the electromagnetic pulse riveted joint is the process that is fit to the TITAIUM ALLOY RIVETS riveted joint.Mainly can provide the enough load that makes it to be out of shape owing to electromagnetic riveting process, can pass through electromagnetic riveting discharge loop Parameter Optimization again, rivet is impacted loading, make the major diameter TITAIUM ALLOY RIVETS obtain the strain rate that is fit to, thereby realize its riveted joint composite constructions such as metal-metal, metal-composites.
The electromagnetism riveting gun depends primarily on the discharge energy of the capacitor group C of low-voltage electromagnetic riveter to the amplitude of the shock loading of rivet effect
E, according to formula (1) as can be known, promptly be decided by capacitance
C 0 And the discharge voltage at capacitor group two ends
U 0
The strain rate of rivet distortion depends on the action time of the shock loading that puts on rivet, and the latter is decided by the cycle of discharge loop
T, see formula (2).Has only inductance value when discharge loop
LAnd capacitance
C 0 Under the coupling appropriate condition, could satisfy the condition that obtains the TITAIUM ALLOY RIVETS riveted joint.And inductance value
LMainly relevant with the factors such as area, circle cross-sectional area and the number of turn of the sectional dimension of discharge loop lead and length, coil.
Therefore, electromagnetic riveting discharge loop parameter capacitance
C 0 , voltage
U 0 And inductance
LDistortion plays a crucial role to rivet, need could obtain to satisfy the parameter condition of rivet deformation requirements by the optimization coupling of system.
(1)
(2)
The riveting gun Stroke Control power source of electromagnetic riveting press is placed in bending shape upper arm top, in conjunction with the axially-movable of displacement transducer control electromagnetism riveting gun.Form quality for the ease of height and the observation heading of adjusting heading, adopt positive riveting method to rivet usually, when promptly riveting, rivet penetrates from bottom to top, whenever puts a rivet, and equipment is finished the working cycles that presses.
Electromagnetic riveting process:, be communicated with the charge circuit of the low-voltage electromagnetic riveter 8 that constitutes by rectifier 8-2, current-limiting resistance R and capacitor group C by control cabinet 10 closed electromagnetic riveted joint charge switch 8-1.Outer net 380V or 220V power supply charge to capacitor group C by charge circuit.After charging to predeterminated voltage, disconnect electromagnetic riveting charge switch 8-1 by control cabinet 10, cut off charge circuit.Produce high-voltage pulse by control cabinet 10 control high-voltage pulse generator 8-4 again and trigger high-frequency thyratron transistor discharge switch 8-3, the discharge loop that conducting is made of the coil 2-2 in capacitor group C, the electromagnetism riveting gun 2.Because capacitor group C and coil 2-2 constitute the typical R-L-C loop, discharge current by coil 2-2 has decay concussion characteristic, according to the law of electromagnetic induction, this electric current carries the driving chip 2-3(electromagnetism riveting gun 2 of contiguous with it high conductivity) middle generation induced-current, and the latter produces induced field.Thus, coil current magnetic field and induced-current magnetic field produce stack and strengthen in coil 2-2 and driving chip 2-3 gap.This enhancing magnetic field and the effect of driving chip induced-current make driving chip 2-3 be subjected to axially downward impulse load, by behind the amplification of stress wave modulator 2-1, act on rivet 13 by upper rivet model 4 again, realize the distortion and the connection procedure of rivet 13.
Claims (4)
1. electromagnetic riveting press that is applicable to large-diameter rivets is characterized in that: described squeeze riveter is made up of bending shape upper arm (1), electromagnetism riveting gun (2), riveting gun Stroke Control power source (3), upper rivet model (4), lower rivet model (5), workbench (7), low-voltage electromagnetic riveter (8), control cabinet (10), spring compression device (11) and base (14); Spring compression device (11) is made up of spring (11-1) and die sleeve (11-2); Bending shape upper arm (1) is made up of the horizontal arm of making one (1-1) and vertical arm (1-2), vertically the upper surface of the lower end of arm (1-2) and base (14) is affixed, the upper surface of base (14) is provided with convex (14-1), workbench (7) is packed on the convex (14-1), the coaxial successively from top to bottom setting of upper rivet model (4) and lower rivet model (5), and lower rivet model (5) is arranged on the workbench (7), die sleeve (11-2) is sleeved on that upper rivet model (4) is gone up and the two is slidingly matched, spring (11-1) is sleeved on the upper rivet model (4), the lower surface of spring (11-1) is arranged on the upper surface of die sleeve (11-2), the upper surface of upper rivet model (4) reclines mutually with the lower surface of the stress wave modulator (2-1) of electromagnetism riveting gun (2) or makes one, vertically be provided with slideway on the horizontal arm (1-1), electromagnetism riveting gun (2) is installed on the slideway on the horizontal arm (1-1) and with it and is slidingly matched, riveting gun Stroke Control power source (3) is arranged on that electromagnetism riveting gun (2) is gone up and the two removably connects, one in three control signal outputs of the control signal input of riveting gun Stroke Control power source (3) and control cabinet (10) is connected, electromagnetic riveting charge switch (8-1) break-make that is used to control low-voltage electromagnetic riveter (8) in two of the residues in three control signal outputs of control cabinet (10), signal input part with the high-voltage pulse generator (8-4) of low-voltage electromagnetic riveter (8) of residue in three control signal outputs of control cabinet (10) is connected, the signal output part of this high-voltage pulse generator (8-4) is used to control high-frequency thyratron transistor discharge switch (8-3) break-make of low-voltage electromagnetic riveter (8), the discharge signal cathode output end of low-voltage electromagnetic riveter (8) is connected with the top of the coil (2-2) of electromagnetism riveting gun (2), the discharge signal cathode output end of low-voltage electromagnetic riveter (8) is connected with the end of the coil (2-2) of electromagnetism riveting gun (2), constitutes the discharge loop of low-voltage electromagnetic riveter (8) thus.
2. a kind of electromagnetic riveting press that is applicable to large-diameter rivets according to claim 1 is characterized in that: low-voltage electromagnetic riveter (8) is made up of electromagnetic riveting charge switch (8-1), capacitor group (C), current-limiting resistance (R), rectifier (8-2), high-frequency thyratron transistor discharge switch (8-3) and high-voltage pulse generator (8-4); The two ends of power supply are connected with two ac voltage inputs of rectifier (8-2) respectively, the dc voltage electrode output of rectifier (8-2) is connected with an end of current-limiting resistance (R), the other end of current-limiting resistance (R) is connected with an end of electromagnetic riveting charge switch (8-1), the other end of electromagnetic riveting charge switch (8-1) is connected with an end of high-frequency thyratron transistor discharge switch (8-3) and the positive terminal of capacitor group (C) respectively, the other end of high-frequency thyratron transistor discharge switch (8-3) is the discharge signal cathode output end of low-voltage electromagnetic riveter (8), the negative pole end of the DC voltage cathode output end of rectifier (8-2) and capacitor group (C) all is connected with the discharge signal cathode output end of low-voltage electromagnetic riveter (8), and the signal output part of high-voltage pulse generator (8-4) is connected with the discharge control signal input of high-frequency thyratron transistor discharge switch (8-3).
3. riveting method that utilizes the described electromagnetic riveting press of claim 1 to realize large-diameter rivets, it is characterized in that: described method is realized by following steps: one, according to the structural form selection upper rivet model (4) and the lower rivet model (5) of construction package to be riveted (12), rivet (13) is selected major diameter TITAIUM ALLOY RIVETS or large diameter aluminium alloy rivet for use, the head of rivet (13) is countersunk head or cup head shape, the diameter of major diameter TITAIUM ALLOY RIVETS is Ф 2-Ф 6mm, and the diameter of large diameter aluminium alloy rivet is Ф 4-Ф 10mm; Two, the upper surface of upper rivet model (4) is reclined mutually with the lower surface of the stress wave modulator (2-1) of electromagnetism riveting gun (2) or make one, lower rivet model (5) is placed on the workbench (7); Three, connect the riveting gun Stroke Control power source (3) of electromagnetic riveting press, adjust the spacing between upper rivet model (4) and the lower rivet model (5): at first electromagnetism riveting gun (2) is dropped to extreme lower position, adjust the position of workbench (7) then, and by the nail bar of the thickness of interlayer of construction package to be riveted (12) and rivet (13) in advance the amount of stretching height sum record needed distance; Four, construction package to be riveted (12) is placed lower rivet model (5) go up and location, system rivet hole, Huo countersunk head nest or counterbore, removal burr and cleaning, rivet in the step 1 (13) is placed in the rivet hole of construction package to be riveted (12), and again that construction package to be riveted (12) and lower rivet model (5) is fixing; Five, during riveted joint, press the control button of the control cabinet (10) of electromagnetic riveting press, riveting gun Stroke Control power source (3) drives electromagnetism riveting gun (2) and moves down, at first, compress construction package to be riveted (12) by spring compression device (11), the electromagnetic riveting charge switch (8-1) of the low-voltage electromagnetic riveter (8) of control cabinet (10) the closed electromagnetic squeeze riveter by electromagnetic riveting press, connection is by rectifier (8-2), power supply, the charge circuit of the low-voltage electromagnetic riveter (8) that current-limiting resistance (R) and capacitor group (C) constitute, capacitor group (C) is charged, capacitance is 10000-140000 μ F, when charging finishes, control cabinet (10) by electromagnetic riveting press disconnects the electromagnetic riveting charge switch (8-1) of low-voltage electromagnetic riveter (8), cuts off charge circuit; Produce the high-voltage pulse triggering high-frequency thyratron transistor discharge switch (8-3) of 10-15kV by control cabinet (10) the control high-voltage pulse generator (8-4) of electromagnetic riveting press, make it closed, the discharge loop that conducting is made of the coil (2-2) in capacitor group (C) and the electromagnetism riveting gun (2), capacitor group (C) discharge, discharge voltage is 300-1000V, driving chip (2-3) on the electromagnetism riveting gun (2) is subjected to axially downward impulse load effect, and amplify after upper rivet model (4) acts on the rivet (13) by the stress wave modulator (2-1) on the electromagnetism riveting gun (2), make the nail bar extension of rivet (13) form heading; Six, under riveting gun Stroke Control power source (3) effect, electromagnetism riveting gun (2) drives upper rivet model (4) and spring compression device (11) reposition, finishes a riveted joint cyclic process, and a riveted joint used time of cyclic process is 2-10s.
4. a kind of riveting method that is applicable to large-diameter rivets according to claim 3, it is characterized in that: in the step 5, before the control button of pressing the control cabinet of electromagnetic riveting press (10), construction package to be riveted (12) surface should be kept axis normal with upper rivet model (4) and lower rivet model (5).
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| CN2010101453871A CN101856713B (en) | 2010-04-13 | 2010-04-13 | Electromagnetic riveting press suitable for large-diameter rivets and press riveting method thereof |
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| CN2010101453871A CN101856713B (en) | 2010-04-13 | 2010-04-13 | Electromagnetic riveting press suitable for large-diameter rivets and press riveting method thereof |
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| CN102357641A (en) * | 2011-09-29 | 2012-02-22 | 西北工业大学 | Rivet joint, auxiliary rivet joint and method for stress wave mounting of interference fit fastener |
| CN102527905A (en) * | 2012-01-11 | 2012-07-04 | 西北工业大学 | Headless rivet positioning device and method for controlling overhanging of two ends of headless rivet |
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