CN109501402B - The preparation method of pre-drilled cavity aluminium foam sandwich plate and its self-piercing riveting device and clinching method with metal plate - Google Patents
The preparation method of pre-drilled cavity aluminium foam sandwich plate and its self-piercing riveting device and clinching method with metal plate Download PDFInfo
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- CN109501402B CN109501402B CN201811335982.4A CN201811335982A CN109501402B CN 109501402 B CN109501402 B CN 109501402B CN 201811335982 A CN201811335982 A CN 201811335982A CN 109501402 B CN109501402 B CN 109501402B
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- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/02—Riveting procedures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/14—Riveting machines specially adapted for riveting specific articles, e.g. brake lining machines
- B21J15/147—Composite articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
- B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2266/00—Composition of foam
- B32B2266/04—Inorganic
- B32B2266/045—Metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
Abstract
The invention discloses the preparation method of pre-drilled cavity aluminium foam sandwich plate, it is not related to the large deformation of foamed aluminium cavernous structure in riveting process, solves the problems, such as that Local Contraction deformation occurs in riveting process and causes adjacent material that warpage damage occurs for foamed aluminium board.The invention also discloses the self-piercing riveting devices and clinching method of pre-drilled cavity aluminium foam sandwich plate and metal plate, by the aluminium foam sandwich plate for making pre-drilled cavity, using semi-hollow self-punching rivet, the cylindrical metal plate of assist formation is placed in aluminium foam sandwich plate hole, connection riveting process being converted between light sheet material can be used for the connection of the aluminium foam sandwich plate of different-thickness；And riveting process avoids the destruction to foamed aluminium cavernous structure, and connector is made to have good leakproofness and mechanical property.
Description
Technical field
The invention belongs to aluminium foam sandwich plates and metal plate riveting technology field, in particular to pre-drilled cavity aluminium foam sandwich plate
Preparation method and its self-piercing riveting device and clinching method with metal plate.
Background technique
Foam metal is a kind of novel low density material, has specific strength height, good energy-absorbing feature, energy sound insulation and noise reduction
And the advantages such as heat-resistant quality, be mainly used as building board, energy-absorbing material, fire proofing material and sound-absorbing material etc., Aeronautics and Astronautics,
Application in the fields such as automobile manufacture and building constantly expands.Foamed aluminium as a kind of most widely used foam metal, by
Automobile industry and the manufacturing favor of other communications and transportation.
In practical engineering applications, application of the foamed aluminium in manufacturing industry is mostly sandwich Sandwich Plates, i.e. two layers of thin
Aluminium metal sheet and foam aluminium sandwich structure composition.The certain auto parts manufactured using aluminium foam sandwich structure, quality are
Originally the 1/2 of steel construction, and rigidity improves 10 times, has good heat preservation heat-insulating property.Interconnection technique is material in reality
The key of promotion and application is obtained in engineering, the interconnection technique for not having mature and reliable can make aluminium foam sandwich board member be difficult to reality
Now produce in enormous quantities and applies.The connection of aluminium foam sandwich structure and metal plate at present is usually using welding, Nian Jie and traditional
The interconnection techniques such as riveting, aluminium foam sandwich plate would generally be attached with the metal plate of unlike material in practical engineering applications,
Since the fusing point and thermal expansion coefficient difference of xenogenesis plate are larger, the joint performance obtained using welding technique is poor or even can not
Realize that it is effectively connected；Traditional mechanical connection by mechanical external lock mode realize plate connect, cause connector unsightly and
Leakproofness is poor；Bonded joint is easy to happen brittle fracture failure, while affected by environment larger, for connecing under extreme environment operating condition
Head easily fails.Self-piercing riveting is become as a kind of board interconnection technique by the plasticity of connected plate and rivet
Shape forms mechanical internal lock, and advantageous in difficult welding metal connection side's mask such as progress dissimilar metal, nonmetallic, connector has preferable
Leakproofness and mechanical property.
But since foamed aluminium thickness is thicker and flexibility is poor, with traditional self-punching riveting technology directly to aluminium foam sandwich plate
Be attached will cause cavernous structure local collapse cause around aluminium sheet buckling deformation occurs, or even riveting process cannot be completed；
The self-piercing riveting of aluminium foam sandwich plate is always problem urgently to be resolved.
Summary of the invention
The present invention provides the preparation methods of pre-drilled cavity aluminium foam sandwich plate, it is therefore an objective to solve foamed aluminium board in riveting process
The problem of middle generation Local Contraction deformation causes adjacent material that warpage damage occurs.
The present invention also provides the self-piercing riveting devices and clinching method of pre-drilled cavity aluminium foam sandwich plate and metal plate, pass through
The aluminium foam sandwich plate for making pre-drilled cavity places assist formation using semi-hollow self-punching rivet in aluminium foam sandwich plate hole
Cylindrical metal plate, connection riveting process being converted between light sheet material can be used for the aluminium foam sandwich plate of different-thickness
Connection；Make connector that there is good leakproofness and mechanical property.
The self-piercing riveting method of pre-drilled cavity aluminium foam sandwich plate and metal plate provided by the invention, by controlling to blank holder
Pressure, control in riveting process pressure suffered by aluminium foam sandwich plate to keep compaction pressure appropriate and avoid pressing force mistake
Cause foamed aluminium cavernous structure to collapse greatly, makes foamed aluminium performance impairment.
Technical solution provided by the invention are as follows:
The preparation method of pre-drilled cavity aluminium foam sandwich plate, includes the following steps:
Step 1: opening up the first circular through hole on the first fine and close aluminium sheet；
Step 2: opening up the second circular through hole on foamed aluminium board；
Step 3: production metal cylindrical film；
Wherein, the diameter and the metal cylindrical film of the diameter of first circular through hole, second circular through hole
Diameter it is all the same；
Step 4: the metal cylindrical film is placed in second circular through hole, lower surface and the foamed aluminium
The lower surface of plate is coplanar, the region fixed bonding that the metal cylindrical film is contacted with the foamed aluminium board；
Step 5: the described first fine and close aluminium sheet to be placed on to the side of the foamed aluminium board, make first circular through hole
It is coaxial with second circular through hole, by the surface fixed bonding on the surface of the described first fine and close aluminium sheet and the foamed aluminium board；
Second fine and close aluminium sheet is placed on to the other side of the foamed aluminium board, by the surface of the described second fine and close aluminium sheet and the foamed aluminium
The surface fixed bonding of plate；After solidification, pre-drilled cavity aluminium foam sandwich plate is obtained.
Preferably, the thickness of the metal cylindrical film is less than the thickness of foamed aluminium board.
The self-piercing riveting device of pre-drilled cavity aluminium foam sandwich plate and metal plate uses the pre-drilled cavity aluminium foam sandwich
Plate, comprising:
Rivet；
Cavity plate main body, center offer concave die cavity, and the side wall of the concave die cavity is cylindrical, at center
For conical boss；The size of the concave die cavity matches with the rivet；
Blank holder offers cylindrical central through hole；
Formed punch, can be in the central through hole along the axially reciprocating of the central through hole；
Wherein, the pre-drilled cavity aluminium foam sandwich plate and metal plate, which are adjacent to, is placed on the cavity plate main body and the blank holder
Between, keep the central through hole, the first through hole and the concave die cavity coaxial；The rivet can be in the fortune of the formed punch
Movement rivets the pre-drilled cavity aluminium foam sandwich plate and the metal plate at the first through hole under using；
Multiple pressure sensors are distributed in the blank holder on the end face of the pre-drilled cavity aluminium foam sandwich plate.
Preferably, the rotation conllinear of the axis of rotation of the concave die cavity and the conical boss.
Preferably, the rivet includes the first part sequentially coaxially connected, second part and Part III；
Wherein, the first part and the second part are solid cylinder, and the Part III has for one end
The hollow cylinder of opening；And it is sequentially reduced from the outer diameter of the first part, second part to the Part III.
Preferably, the diameter of the second part is equal with the diameter of the first through hole.
Preferably, arc transition is used between the end face and medial surface of the Part III open side.
The self-piercing riveting method of pre-drilled cavity aluminium foam sandwich plate and metal plate uses the pre-drilled cavity aluminium foam sandwich plate
With the self-piercing riveting device of metal plate, include the following steps:
Metal plate and pre-drilled cavity aluminium foam sandwich plate are sequentially placed in cavity plate main body by step 1；Wherein, second is fine and close
Aluminium sheet is adjacent to the metal sheet surface；
Step 2, starting pressure sensor, driving blank holder moves downward, by the metal plate and the pre-drilled cavity foam
Aluminium interlayer plate compresses；
Rivet is put into the central through hole of blank holder by step 3, and driving formed punch moves down, and rivet is pushed to pierce through foamed aluminium folder
The fine and close aluminium sheet of metal cylindrical film and second in laminate hole；The Part III of rivet exists under the action of formed punch and cavity plate main body
It is opened in the metal plate and forms mechanical internal lock structure；
Step 4 is displaced downwardly to lower dead center to formed punch, and riveting is completed, and formed punch and blank holder are back to initial position.
Preferably, in riveting process, by pressure sensor real-time detection pre-drilled cavity aluminum alloy interlayer plate surface by
The pressure arrived, control are applied to the driving force of blank holder, to guarantee that the pressure that aluminum alloy interlayer plate is subject to is no more than setting most
Big pressure.
Preferably, the maximum pressure are as follows:
Wherein, P0For the incompressible intensity of foamed aluminium board, T is the temperature of the first fine and close surface of aluminum plate, THFor environment temperature；V
For the movement speed of formed punch, VminFor the formed punch minimum translating velocity of setting, VmaxFor the formed punch maximum movement speed of setting；D is
The aperture of first circular through hole；H is the thickness of foamed aluminium board.
The beneficial effects of the present invention are:
(1) present invention uses the aluminium foam sandwich plate of pre-drilled cavity, is not related to the big of foamed aluminium cavernous structure in riveting process
Deformation, solving foamed aluminium compressive deformation locally occurs causes adjacent material that warpage damage occurs, while it is thicker to solve thickness
Foamed aluminium board the problem of can not carrying out self-piercing riveting.
(2) present invention uses semi-hollow self-punching rivet comprising solid leg and hollow leg, by adjusting solid leg
The self-piercing riveting of the aluminium foam sandwich plate of different-thickness can be met with the length of hollow leg.
(3) present invention is provided with pressure sensor, the pressure that real-time monitoring aluminium sheet is subject in riveting process, control riveting
Aluminium foam sandwich plate pressure value in the process keeps compaction pressure appropriate, avoids pressing force is excessive from causing foamed aluminium poroid
Structural collapse makes foamed aluminium performance impairment.
(4) present invention has the advantages such as strong, the at low cost, excellent in mechanical performance of universality, while connector is with preferable close
Envelope property and anticorrosive property.
Detailed description of the invention
Fig. 1 is the self-piercing riveting device cross-sectional view of pre-drilled cavity aluminium foam sandwich plate of the present invention and metal plate.
Fig. 2 moves to lower dead center for formed punch during the self-piercing riveting of aluminium foam sandwich plate of the present invention and metal plate
Schematic diagram.
Fig. 3 is the cross-sectional view of application pressing force sensor on blank holder of the present invention.
Fig. 4 is the cross-sectional view of rivet of the present invention.
Fig. 5 is the cross-sectional view of the fine and close aluminium sheet after aperture of the present invention.
Fig. 6 is the cross-sectional view of the foamed aluminium board after aperture of the present invention.
Fig. 7 is the cross-sectional view of the fine and close aluminium sheet of non-aperture of the present invention.
Fig. 8 is the cross-sectional view of metal cylindrical film of the present invention.
Fig. 9 is the cross-sectional view of pre-drilled cavity aluminium foam sandwich plate of the present invention.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figs 1-4, the present invention provides the self-piercing riveting devices of pre-drilled cavity aluminium foam sandwich plate and metal plate, mainly
It include: cavity plate main body 110, concave die cavity 120, blank holder 130, patch type pressure sensor 140, formed punch 150 and rivet 160.
Cavity plate main body 110 is disc-shaped structure, and concave die cavity 120, cavity plate are opened up at the top center of cavity plate main body 110
The side wall of type chamber 120 is cylinder, and there is a conical boss 121 at center, and the axis of rotation and cone of concave die cavity 120 are convex
The rotation conllinear of platform 121.
Blank holder 130, offers cylindrical center through-hole 131, and blank holder 130 is arranged above cavity plate main body 110.
Formed punch 150 is solid cylindrical configuration part, and one end of formed punch 150 is arranged in the central through hole 131 of blank holder 130, separately
One end is connect with driving device (not shown), and formed punch 150 can slide up and down in central through hole 131.
As shown in figure 3, uniformly distributed 6~8 pressure sensors 140 in the lower surface of blank holder 130.Pressure sensor
140 use patch type pressure sensor, occupy little space, and are suitble to measurement metal surface pressure.Pressure sensor 140 uses glue
Cementation is scheduled on blank holder 130, and gluing operations are simple and may be reused.
Rivet 160, uses semitubular rivet, rivet include the head 161 sequentially coaxially connected, solid leg 162 and
Hollow leg 163；Wherein, the head 161 and solid leg 162 are solid cylinder, and hollow leg 163 has for one end
The hollow cylinder of opening；And it is sequentially reduced from the outer diameter on head 161, solid leg 162 to hollow leg 163.The sky
Arc transition is used between the end face and medial surface of 163 open side of heart leg.Wherein, 161 diameter range of head of rivet 160 is
11~13mm, solid 162 diameter range of leg are 8~10mm, and hollow 163 external diametrical extent of leg is 5~7mm.
Wherein, the length of solid leg 162 is rule of thumb set are as follows:Hollow leg inner cylinder
The height of through-hole are as follows:For proof strength, hollow leg inside is equipped with bottom plate with solid leg junction,
The height of bottom plate is set as the 1/5~1/6 of cylindrical hole height.
In formula, h is the thickness of foamed aluminium board, h1For the thickness of the fine and close aluminium sheet of aperture, h3For the thickness of metal cylindrical film
Degree, h4For the thickness of the fine and close aluminium sheet of non-aperture, h5For the thickness of metal plate, θ is setting value, takes 20~30 degree.
As shown in figures 5-9, the present invention provides the preparation methods of pre-drilled cavity aluminium foam sandwich plate, comprising the following steps:
Step 1: taking the identical two blocks of fine and close aluminium sheets 210,240 of planar dimension and one piece of foamed aluminium board 220；And choose conjunction
Suitable rivet 160；
Step 2: the riveting position in foamed aluminium board 220 is punched, the diameter in hole 221 and the solid leg of rivet 160
162 diameter is identical；Make the hole 221 that can pass through foamed aluminium board 220 on the downside of the leg of rivet 160 just；To one of cause
Close aluminium sheet 210 carries out pre-perforated, and 221 position of hole on 211 position of hole and diameter and above-mentioned foamed aluminium board 220 is identical as diameter；
Step 3: production metal cylindrical film 230, the diameter of metal cylindrical film 230 and the hole on foamed aluminium board 220
221 diameter is identical, and the thickness of metal cylindrical film 230 is less than the thickness of foamed aluminium board 220.As a further preference, circle
The thickness of cylindricality sheet metal 230 is set as being the 1/4~1/3 of 220 thickness of foamed aluminium board.
Step 4: metal cylindrical film 230 is placed in the hole of foamed aluminium board 220, the following table of metal cylindrical film 230
Face is coplanar with the lower surface of foamed aluminium board 220, and metal cylindrical film 230 and 220 contact area of foamed aluminium board are viscous with epoxy resin
Agent is connect to be fixedly connected；
Step 5: with epoxy resin adhesive by the upper of the lower surface of pre-perforated fine and close aluminium sheet 210 and foamed aluminium board 220
Surface is bonded, and guarantees that the axis in hole 211 and the axis in the hole 221 on foamed aluminium board 220 are total on fine and close aluminium sheet 210 when bonding
Line；The upper surface for the fine and close aluminium sheet 240 not punched is carried out with the lower surface of foamed aluminium board 220 be bonded；
Step 6: the placement of pre-drilled cavity aluminium foam sandwich plate 200 after bonding is carried out precuring at normal temperature.
The present invention also provides the self-piercing riveting methods of pre-drilled cavity aluminium foam sandwich plate and metal plate, are provided using the present invention
Pre-drilled cavity aluminium foam sandwich plate and the self-piercing riveting device of metal plate riveted, as shown in Fig. 1-2, include the following steps:
Pre-drilled cavity aluminium foam sandwich plate 200 and metal plate 300 that preparation is completed are placed in cavity plate main body 110 by step 1
Surface, aluminium foam sandwich plate 200 are used as upper plate, and metal plate 300 is used as lower plate, wherein the cause of aperture in aluminium foam sandwich plate 200
The side of close aluminium sheet 210 is placed upward, and the side of the fine and close aluminium sheet 240 of non-aperture is placed on down to be contacted with metal plate 300；Foam
The coaxial placement of pre-drilled cavity, concave die cavity 120 in aluminium interlayer plate 200.
Rivet 160 is sent into the central through hole 131 of blank holder 130 by step 2 by continuous nail feeding machanism (not shown),
150 one end of formed punch is centrally disposed in through-hole 131, and is located at the top of rivet 160；And guarantee in aluminium foam sandwich plate 200
Pre-drilled cavity, formed punch 150 and concave die cavity 120 concentricity.
Step 3, starting pressure sensor 140, are arranged maximum pressure value according to the incompressible intensity of foamed aluminium board, open and drive
Dynamic device promotes blank holder 130 to move downward, and compresses pre-drilled cavity aluminium foam sandwich plate 200 and metal plate 300.
Step 4, driving device driving formed punch 150 are moved down along the central through hole 131 of blank holder 130, and rivet 160 is promoted to pierce
The metal cylindrical film 230 and downside densification aluminium sheet 240 in 2 00 hole of aluminium foam sandwich plate are worn, metal cylindrical film 230 is promoted
It is flowed into the concave die cavity 120 in cavity plate main body 110 with the metal of downside densification aluminium sheet 240, the rivet 160 under cavity plate effect
Hollow leg 163 opened in metal plate 300 and form mechanical internal lock structure.
Due to that pressure-pad-force can be promoted to increase in riveting process, according to the feedback of pressure sensor 140, the work of blank holder 130
It is firmly kept by dynamic regulation, the pressure (pressure that pressure sensor detects) for being subject to aluminium foam sandwich plate is in setting
Maximum pressure value within the scope of, avoid pressing force is excessive foamed aluminium cavernous structure is caused to collapse, make foamed aluminium performance impairment.
Step 5 is displaced downwardly to set distance to formed punch 150, and riveting is completed, and formed punch 150 and blank holder 130 rise return
To initial position.
In another embodiment, the surface temperature T of the fine and close aluminium sheet 210 of aperture, environment temperature are acquired respectively by sensor
Spend THAnd the movement speed V of formed punch, in riveting process, according to factors such as the thickness of temperature, the speed of formed punch and foamed aluminium board
The maximum pressure that determining aluminium foam sandwich plate can be born, and set maximum pressure it are as follows:
Wherein, P0For the incompressible intensity of foamed aluminium board, Mpa, T are the temperature of the first fine and close surface of aluminum plate, DEG C；THFor ring
Border temperature, DEG C；V is the movement speed of formed punch, mm/s；VminFor the formed punch minimum translating velocity of setting, mm/s；VmaxFor setting
Formed punch maximum movement speed, mm/s；D is the aperture of the first circular through hole, mm；H is the thickness of foamed aluminium board, mm.Wherein, formed punch
The initial value of movement speed is set as VminAnd VmaxMedian.
Embodiment 1
Implement by taking the self-piercing riveting process of aluminium foam sandwich plate and steel plate as an example, be described further:
(1) take one block of closed-cell foam aluminium sheet and two pieces of aluminium alloy plates respectively, foamed aluminium board having a size of 200mm × 80mm ×
10mm, porosity 0.5, aperture 1.5mm；The size of two pieces of aluminium alloy plates is 200mm × 80mm × 0.5mm；It is steeping
Opening up diameter on foam aluminium sheet and one of aluminium alloy plate respectively is 7.7mm through-hole；To take diameter be 7.7mm, is highly the circle of 3mm
Cylindricality aluminum alloy sheet；The aluminium alloy plate of aperture is subjected to be bonded, aperture aluminium alloy using epoxy resin adhesive with foamed aluminium board
The relative position in hole and central axes are identical on plate and foamed aluminium board；Cylindrical aluminium alloy sheet is placed in the hole of foamed aluminium board,
The lower surface of cylindrical aluminium alloy sheet and the lower surface of foamed aluminium board are coplanar, cylindrical aluminium alloy sheet circumferential surface and foamed aluminium board
The surface area contact of aperture be bonded using epoxy resin adhesive；By the aluminium alloy plate of non-aperture and foamed aluminium board
Lower surface is bonded by epoxy resin adhesive；Uncured aluminium foam sandwich plate is placed and is solidified 24 hours at room temperature.
(2) choosing a block size is 200mm × 80mm × 2mm steel plate, and foamed aluminium with holes is completed in the preparation and is pressed from both sides
Laminate and steel plate are placed in the upper surface of cavity plate main body, and aluminium foam sandwich plate is as upper plate, and steel plate is as lower plate, wherein foamed aluminium
The side of aperture aluminium sheet is placed in sandwich plate, and the side of non-aperture aluminium sheet is placed on down to be contacted with steel plate；And guarantee foam
The concentricity in hole, formed punch and cavity plate main body in aluminium interlayer plate.
(3) rivet is sent into the through-hole of blank holder by continuous nail feeding machanism, rivet head diameter is 11mm, the solid leg of rivet
Portion's diameter is 7.7mm, and hollow leg outer diameter is 5.7mm.The diameter of the solid leg of rivet and the aluminium foam sandwich plate aperture are straight
Diameter is identical, and making can be just in the hole of aluminium foam sandwich plate on the downside of rivet.
Wherein, the length of solid leg 162 is rule of thumb set are as follows:Hollow legs
The height of portion's inner cylinder through-hole are as follows:(taking θ=30 °)；Inside hollow leg with it is solid
The height of leg junction bottom plate is set as cylindrical hole height
In formula, h is the thickness of foamed aluminium board, h1For the thickness of the fine and close aluminium sheet of aperture, h3For the thickness of metal cylindrical film
Degree, h4For the thickness of the fine and close aluminium sheet of non-aperture, h5For the thickness of metal plate.
(4) start pressure sensor, the incompressible intensity of foamed aluminium board is 20Mpa；Driving device promotes blank holder downward
Movement compresses aluminium foam sandwich plate.Under initial situation, T=TH, the movement speed that formed punch is arranged is 200mm/s, wherein Vmax=
250mm/s, Vmin=150mm/s；According to formula:
The maximum pressure set under original state is calculated as 19.4MPa, in riveting process, the sampling period is set,
And maximum pressure value is adjusted according to above-mentioned formula calculating according to the sampling period.
(5) driving device driving formed punch is moved down along the through-hole of blank holder, and rivet is promoted to pierce through in aluminium foam sandwich plate hole
Metal cylindrical film and aluminium foam sandwich plate downside aluminium alloy plate, promote the gold of metal cylindrical film and downside aluminium alloy plate
Belong to and flow into the intracorporal concave die cavity of cavity plate master, the hollow leg of rivet is opened in steel plate under cavity plate effect forms mechanical internal lock
Structure.Due to that pressure-pad-force can be promoted to increase in riveting process, by the feedback of pressure sensor, the active force of blank holder passes through dynamic
State is adjusted within the scope of the maximum pressure value for being maintained at set.Avoid pressing force is excessive from leading to foam while guaranteeing pressing force
Aluminium cavernous structure collapses, and makes foamed aluminium performance impairment.
(6) set distance is displaced downwardly to formed punch, riveting is completed, and formed punch and blank holder are back to initial position.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (8)
1. for the preparation method with the pre-drilled cavity aluminium foam sandwich plate of metal plate self-piercing riveting, which is characterized in that including as follows
Step:
Step 1: opening up the first circular through hole on the first fine and close aluminium sheet；
Step 2: opening up the second circular through hole on foamed aluminium board；
Step 3: production metal cylindrical film；
Wherein, the diameter of first circular through hole, the diameter of second circular through hole and the metal cylindrical film is straight
Diameter is all the same；
Step 4: the metal cylindrical film is placed in second circular through hole, lower surface and the foamed aluminium board
Lower surface is coplanar, the region fixed bonding that the metal cylindrical film is contacted with the foamed aluminium board；
Step 5: the described first fine and close aluminium sheet to be placed on to the side of the foamed aluminium board, make first circular through hole and institute
State that the second circular through hole is coaxial, by the surface fixed bonding on the surface of the described first fine and close aluminium sheet and the foamed aluminium board；By
Two fine and close aluminium sheets are placed on the other side of the foamed aluminium board, by the surface of the described second fine and close aluminium sheet and the foamed aluminium board
Surface fixed bonding；After solidification, pre-drilled cavity aluminium foam sandwich plate is obtained；
The thickness of the metal cylindrical film is less than the thickness of foamed aluminium board；
The self-piercing riveting device of the pre-drilled cavity aluminium foam sandwich plate and metal plate, comprising:
Rivet；
Cavity plate main body, center offer concave die cavity, and it is circular cone at center that the side wall of the concave die cavity, which is cylinder,
Shape boss；The size of the concave die cavity matches with the rivet；
Blank holder offers cylindrical central through hole；
Formed punch, can be in the central through hole along the axially reciprocating of the central through hole；
Wherein, the pre-drilled cavity aluminium foam sandwich plate and metal plate be adjacent to be placed on the cavity plate main body and the blank holder it
Between, keep the central through hole, first circular through hole and the concave die cavity coaxial；The rivet can be in the formed punch
The pre-drilled cavity aluminium foam sandwich plate and the metal plate are riveted at first circular through hole under movement effect；
Multiple pressure sensors are distributed in the blank holder on the end face of the pre-drilled cavity aluminium foam sandwich plate.
2. the preparation method according to claim 1 for the pre-drilled cavity aluminium foam sandwich plate of metal plate self-piercing riveting,
It is characterized in that, the rotation conllinear of the axis of rotation of the concave die cavity and the conical boss.
3. the preparation method according to claim 2 for the pre-drilled cavity aluminium foam sandwich plate of metal plate self-piercing riveting,
It is characterized in that, the rivet includes the first part sequentially coaxially connected, second part and Part III；
Wherein, the first part and the second part are solid cylinder, and the Part III is that one end has opening
Hollow cylinder；And it is sequentially reduced from the outer diameter of the first part, second part to the Part III.
4. the preparation method according to claim 3 for the pre-drilled cavity aluminium foam sandwich plate of metal plate self-piercing riveting,
It is characterized in that, the diameter of the second part is equal with the diameter of first circular through hole.
5. the preparation method according to claim 4 for the pre-drilled cavity aluminium foam sandwich plate of metal plate self-piercing riveting,
It is characterized in that, using arc transition between the end face and medial surface of the Part III open side.
6. the self-piercing riveting method of pre-drilled cavity aluminium foam sandwich plate and metal plate, which is characterized in that using such as claim 3-5
Pre-drilled cavity aluminium foam sandwich plate and self-piercing riveting device, include the following steps: described in any one
Metal plate and pre-drilled cavity aluminium foam sandwich plate are sequentially placed in cavity plate main body by step 1；Wherein, the second fine and close aluminium sheet
It is adjacent to the metal sheet surface；
Step 2, starting pressure sensor, driving blank holder move downward, the metal plate and the pre-drilled cavity foamed aluminium are pressed from both sides
Laminate compresses；
Rivet is put into the central through hole of blank holder by step 3, and driving formed punch moves down, and rivet is pushed to pierce through aluminium foam sandwich plate
The fine and close aluminium sheet of metal cylindrical film and second in hole；The Part III of rivet is described under the action of formed punch and cavity plate main body
It is opened in metal plate and forms mechanical internal lock structure；
Step 4 is displaced downwardly to lower dead center to formed punch, and riveting is completed, and formed punch and blank holder are back to initial position.
7. the self-piercing riveting method of pre-drilled cavity aluminium foam sandwich plate and metal plate according to claim 6, which is characterized in that
In riveting process, the pressure being subject to by pressure sensor real-time detection pre-drilled cavity aluminium foam sandwich plate surface, control applies
To the driving force of blank holder, to guarantee that the pressure that pre-drilled cavity aluminium foam sandwich plate is subject to is no more than the maximum pressure set.
8. the self-piercing riveting method of pre-drilled cavity aluminium foam sandwich plate and metal plate according to claim 7, which is characterized in that
The maximum pressure are as follows:
Wherein, P0For the incompressible intensity of foamed aluminium board, T is the temperature of the first fine and close surface of aluminum plate, THFor environment temperature；V is punching
The movement speed of head, VminFor the formed punch minimum translating velocity of setting, VmaxFor the formed punch maximum movement speed of setting；D is first
The aperture of circular through hole；H is the thickness of foamed aluminium board.
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| CN114603075A (en) * | 2022-03-25 | 2022-06-10 | 本钢板材股份有限公司 | Method for connecting ultrahigh-strength steel and aluminum alloy by using self-piercing riveting technology |
| CN114932157B (en) * | 2022-04-29 | 2023-05-23 | 天津津荣天宇精密机械股份有限公司 | Punching and riveting processing method of arc extinguishing chamber product |
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| US7984919B2 (en) * | 2009-05-18 | 2011-07-26 | Zephyros, Inc. | Structural mounting insert having a non-conductive isolator |
| JP5838537B2 (en) * | 2011-03-02 | 2016-01-06 | 学校法人日本大学 | Joining method and structure of plate materials using rivets |
| US10054145B2 (en) * | 2014-06-12 | 2018-08-21 | Ford Global Technologies, Llc | Clearance hole for self-piercing rivet |
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| CN107415345A (en) * | 2017-07-11 | 2017-12-01 | 昆明理工大学 | A kind of foamed metal sandwich board self-piercing riveting manufacturing process |
| CN108099219B (en) * | 2017-12-20 | 2019-10-22 | 吉林大学 | A kind of viscous rivetting method between carbon fibre composite plate and aluminium alloy plate |
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