CN106345981B - A kind of forming method of large aluminum alloy die casting - Google Patents
A kind of forming method of large aluminum alloy die casting Download PDFInfo
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- CN106345981B CN106345981B CN201610791755.7A CN201610791755A CN106345981B CN 106345981 B CN106345981 B CN 106345981B CN 201610791755 A CN201610791755 A CN 201610791755A CN 106345981 B CN106345981 B CN 106345981B
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- die casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
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- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of forming method of large aluminum alloy die casting, and upper die forming region is first processed in upper mold, lower die forming area is processed in lower die；The lower exposed face side position that die casting is corresponded on the die joint of lower die processes secondary cavity, and assistant ejector pin is set in secondary cavity position；During upper and lower mould molding, upper and lower mold forming region collectively forms the cavity of compression mod, and die casting is molded in cavity, and an assistant formation portion being connected with the edge of die casting is molded in secondary cavity；Then the mandril and assistant ejector pin being arranged in lower die promote die casting and assistant formation portion to move together, so that die casting is separated with core；The die casting with assistant formation portion is removed, and assistant formation portion is removed with cutter device, you can obtains complete die casting.The present invention can effectively improve force unbalance problem during product ejection, so as to avoid product from being deformed in ejection, be conducive to improve the Forming Quality of large-scale die casting part.
Description
Technical field
The present invention relates to aluminum alloy die-casting technological technical field, more particularly, to a kind of shaping of large aluminum alloy die casting
Method.
Background technology
Aluminum alloy die-casting technological is widely used in the industries such as electronics, automobile, motor, household electrical appliances, communication, its is plastic complex-shaped
Component of machine, and substantial amounts of machining time can be saved, while reduce the loss of material, be conducive to improve production effect
Rate, is adapted to produce in enormous quantities.Aluminium alloy compression casting needs first to process a set of die casting, and die casting has a upper mold and one
Lower die, it is generally the case that in upper mold set the cavity being adapted to product design and connected with cavity into running channel, in lower die
The core and corresponding ejecting mechanism of upper setting and product cavity adaptation, after upper and lower mould is installed on die casting machine and is molded, on
Chamber portion between the cavity of mould and the core of lower die and cavity for shaped article is formed, die casting machine is by the liquid of melting
Aluminium alloy is by the way that into running channel injection type intracavitary, after waiting the liquid aluminium alloy cooling and shaping in cavity, upper and lower mould separates, molding
Die casting is rested on the core of lower die by the Bao Moli that cooling meat is formed, at this time the ejecting mechanism action in lower die, will
The product rested on the core of lower die ejects upwards, so that product is separated with core, you can product is removed.For example, one
Kind is disclosed in Chinese patent literature " die casting with exhaust apparatus ", application publication number CN101850412A, its
Including upper die and lower die, lower mold backing plate and mandril, die casting machine nozzle is located at the top of upper mold, has a common boundary with the die casting machine nozzle upper
The cavity and runner communicated is equipped between mould and lower die, the exhaust apparatus communicated with cavity, the exhaust apparatus bag are equipped with lower die
Include overflowing well, exhaust piece and discharge duct.
In order to ensure the quality of product exposed face, the exposed face of die casting is usually arranged in upper mold by we, and will be outer
Appearance quality requires relatively low medial surface to be arranged in the lower die with ejecting mechanism, while mandril is arranged on non-outer on product
Show up position, so that product is after shaping ejected product by the mandril of lower die, without being left on the exposed face of product
The trace of mandril.But also there is the product of part exposed face for some medial surfaces or downside, it is particularly some shape rulers
Very little larger large-scale die casting part, since mandril can not be set with the exposed face correspondence position in lower die, so as to be easy to cause top
The discontinuity equalization of product when going out, makes product ejection difficult, or causes product to be deformed because of discontinuity equalization.
The content of the invention
The purpose of the present invention is to solve present in the die casting molding method of the prior art can not in lower die it is right
Answer the exposed face position of product that mandril is set, so that force unbalance when causing the product to eject, the problem of product is yielding, there is provided
A kind of forming method of large aluminum alloy die casting, can effectively improve force unbalance problem during product ejection, so as to keep away
Exempt from product to be deformed in ejection, be conducive to improve the Forming Quality of large-scale die casting part.
To achieve these goals, the present invention uses following technical scheme：
A kind of forming method of large aluminum alloy die casting, the lower surface of the die casting have lower exposed face, specific bag
Include following steps：
（1）Being molded the upper mold for processing in the upper mold of the compression mod of die casting and being adapted to the upper surface of die casting
Forming area, processes the lower die forming area being adapted to the lower surface of die casting in lower die；
（2）The lower exposed face side position that die casting is corresponded on the die joint of lower die processes and lower die forming area
The secondary cavity of edge connection, secondary cavity position is corresponded in lower die and sets assistant ejector pin；
（3）Upper and lower mould is installed on die casting machine and molds upper and lower mould, at this time the upper and lower common structure in mold forming region
Into the cavity of compression mod, the liquid aluminium alloy of high temperature enters cavity and secondary cavity by the running gate system in upper mold and cools down
Shaping, so as to mold die casting in cavity, molded in secondary cavity one with the auxiliary that the edge of die casting is connected into
Type portion；
（4）Upper and lower mould separates, and the ejecting mechanism action in lower die, the mandril and assistant ejector pin being arranged in lower die pushes away
Dynamic pressure casting lower surface and assistant formation portion move together, so that die casting is separated with core；
（5）The die casting with assistant formation portion is removed, and assistant formation portion is removed with cutter device, you can has been obtained
Whole die casting.
The present invention passes through the close lower die forming area position setting auxiliary that can not set mandril on the die joint of lower die
Cavity, and corresponding assistant ejector pin is set at secondary cavity, in shaping, one and die casting can be molded at secondary cavity
The assistant formation portion that part is connected, the assistant formation portion form the ejection point of an auxiliary.In ejection, assistant ejector pin pushes away die casting
Dynamic auxiliary forming part simultaneously drives die casting to eject together, avoid die casting ejection difficulty and because ejection when discontinuity equalization
The deformation of products easily occurred.After being ejected Deng die casting, assistant formation portion is can remove, so that it is guaranteed that exposed under die casting
Face does not have the trace of mandril.
Preferably, the assistant ejector pin includes the main auxiliary mandril being arranged side by side and balance ejection casing, main auxiliary
Mandril is located at is located remotely from the edge one of lower die forming area close to the edge side of lower die forming area, balance ejection casing
Side, slidably sets balancing pole, the die joint of upper mold is equipped with corresponding with balancing pole conical in balance ejection casing
Location hole, the upper surface of balance ejection casing are flushed with the bottom surface of secondary cavity, and balancing pole stretches out the upper end of balance ejection casing
Equipped with the taper guide head being adapted to location hole, when upper and lower mould, which molds, to be molded, taper guide head is fitted in location hole, by
The assistant formation portion parcel balancing pole that secondary cavity molds；When mandril and assistant ejector pin promote die casting lower surface and auxiliary
When forming part moves together, balancing pole remains motionless, and balances ejection casing and then promote assistant formation with together with main auxiliary mandril
Move in portion.
For the ease of the cutting in assistant formation portion, the thickness in assistant formation portion cannot be too thick, in this way, when assistant formation portion and
When die casting ejects together, one end is vacantly so as to which the assistant formation portion for being in cantilever beam-like is easily produced because of the thrust of assistant ejector pin
It is folded upward at.For this reason, the present invention is setting balance ejection casing to eject the side of the main auxiliary mandril in assistant formation portion, and
Balancing pole is set in balance ejection casing, so that assistant formation portion is wrapped on balancing pole.When the promotion of main auxiliary mandril is auxiliary
When helping the forming part to move up, the Bao Moli between assistant formation portion and balancing pole forms a downward work to assistant formation portion
Firmly, assistant formation portion at this time is subject to the downward traction action power of die casting, assistant formation in the side of main auxiliary mandril
Portion is subject to the downward active force of balancing pole in the opposite side of main auxiliary mandril so that assistant formation portion left-right balance and avoid
Upward bending is produced, and assistant formation portion can be made to produce enough ejecting forces to die casting.
Preferably, the step of with during cutter device removal assistant formation portion, is as follows：
A. the die casting with assistant formation portion is placed and navigates to a portable positioning being arranged on mobile mould
On device, the assistant formation portion at die casting edge, which then navigates to, to be arranged on mobile mould and positioned at mobile positioning apparatus side
On discontinuous positioner, mobile mould at this time is in position of readiness；
B. mobile positioning apparatus is acted with discontinuous positioner, so as to drive die casting and assistant formation portion synchronous
Clipped position is gone upward to, assistant formation portion at this time is in contact with the punch in the stent above mobile mould；
C. discontinuous positioner stops uplink, and assistant formation portion is clamped, is positioned at punch and discontinuous positioner
Between, running fix device then drives die casting to continue uplink, so that forming relative displacement between die casting and punch, at this time
Cutting edge on punch is that pair assistant formation portion being connected with die casting shears；
D. running fix device band dynamic pressure casting goes upward to upper extreme position, and the cutting edge of punch is completed to assistant formation portion
Shearing so that assistant formation portion and die casting phase separation, assistant formation portion is clamped, is positioned at punch and discontinuous positioning
Between device；
E. running fix device band dynamic pressure casting comes downwards to clipped position, the action of discontinuous positioner, thus with movement
Positioner DL synchronization together；
F. running fix device and discontinuous positioner DL synchronization to lower limit position, die casting at this time position
On running fix device, assistant formation portion separated with die casting is positioned on discontinuous positioner and divides with punch phase
From；
G. die casting is removed from running fix device, assistant formation portion is removed from discontinuous positioner, you can
To complete die casting.
When shearing assistant formation portion, assistant formation subordinate side is subject to the support of discontinuous positioner and determines the present invention
Position, that is to say, that assistant formation portion is in no longer cantilever beam state in shearing, but is clamped, is positioned at punch and discontinuous
Between positioner so that assistant formation portion is not in bending phenomenon in shear history, be effectively prevented from because auxiliary into
The bending in type portion and the notch of die casting torn grain is occurred.Particularly, the present invention is positioned by the movable type that can be moved up
Device and discontinuous positioner make die casting and assistant formation portion rise together, so that relative displacement is formed with punch, and
When punch is contacted with assistant formation portion, discontinuous positioner no longer promotes assistant formation portion to rise, and portable positioning dress
Put, die casting rising is continued to press on, so that the cutting edge of punch forms assistant formation portion good shearing, and die casting
Shearing when do not slow down, so as to avoid shearing when because effect of inertia causes the reduction of relative velocity between punch and die casting,
Advantageously ensure that the smooth of die casting notch.
Preferably, it is as follows to increase step between step a and step b：
The mobile mobile mould of mould driving mechanism driving rises to together with mobile positioning apparatus and discontinuous positioner
Operating position, is positioned at the assistant formation portion on discontinuous positioner and the punch in the stent above mobile mould at this time
The distance between cutting edge is 50-70mm；
Correspondingly, it is as follows to increase step between step f and step g：
The mobile mobile mould of mould driving mechanism driving is dropped to together with mobile positioning apparatus and discontinuous positioner
Position of readiness
In this way, when mobile mould is in position of readiness, there can be larger gap between stent and mobile mould, so that side
Just die casting is placed and navigated on mobile positioning apparatus.When starting shearing, first mobile mould is risen, to reduce movement
The distance between mould and stent, then act again mobile positioning apparatus and discontinuous positioner, promote die casting and
Assistant formation portion rises, so as to reduce the oscilaltion stroke of mobile positioning apparatus and discontinuous positioner, to improve
The intensity and rigidity of mobile positioning apparatus and discontinuous positioner.
Preferably, the lower part of the mobile mould is equipped with cavity, the mobile positioning apparatus includes being arranged in cavity
Fixed plate and be equipped with some guide rods straight up with the associated shift drive mechanism of fixed plate, fixed plate, be oriented to
The end that bar stretches out mobile mould upper surface is equipped with the die casting locating piece being adapted to the surface configuration of die casting；The discontinuous is determined
Position device includes the synchronizing bar being positioned vertically within cavity, and the end that synchronizing bar stretches out mobile mould upper surface is equipped with supporting block, props up
Bracer is equipped with the locating slot being adapted to assistant formation portion, and the middle part that synchronizing bar is located in cavity is equipped with the limited block of evagination, together
The lower end of step bar is arranged with support spring, and the upper end of support spring is against limited block, the fixation so that limited block flexibly reclines
The lower surface of plate.
It is located at due to die casting on the die casting locating piece that several are adapted to the surface configuration of die casting, because
This, when shift drive mechanism driving fixed plate moves up, fixed plate can drive guide rod to move up, and then promote die casting
Move up, at the same time, the elastic force of support spring promotes synchronizing bar synchronously to be moved up with fixed plate, and the limited block on synchronizing bar is then all the time
The lower surface for the fixed plate that reclines.When the assistant formation portion in the supporting block of synchronizing bar upper end contacts punch, shift drive mechanism
Fixed plate is driven to continue uplink, and assistant formation portion and supporting block are then subject to the prevention of punch and stop uplink, so that punching
Head forms shear action to die casting, and support spring at this time then forms one to the assistant formation portion in supporting block and supporting block
A support, avoids assistant formation portion from producing bending.When shift drive mechanism driving fixed plate is moved downward to clipped position, Gu
The lower surface of fixed board is contacted with limited block, so as to drive synchronizing bar to overcome the elastic force of support spring and synchronously move down reset.Due to
The rising of synchronizing bar is to realize soft drive by support spring, therefore can avoid rigid driving mechanism driving synchronizing bar when is easy
The Stroke Control error of appearance.
Preferably, on mobile positioning apparatus is synchronous with discontinuous positioner drive die casting and assistant formation portion
During row to clipped position, the punch in stent moves down, when assistant formation portion is in contact with the cutting edge of punch,
Punch is in contact with the supporting block in support assistant formation portion, and running fix device band dynamic pressure casting continues uplink, and punch is then pushed
Assistant formation portion and supporting block, and promote synchronizing bar to overcome the elastic force of support spring to move down by supporting block, so that
Make to form relative displacement between die casting and punch, at this time the cutting edge on punch be pair assistant formation portion being connected with die casting into
Row shearing；During running fix device band dynamic pressure casting comes downwards to clipped position, punch moves up reset.
Punch can be driven by mechanisms such as oil cylinders, since when die casting moves up, punch also moves down at the same time, so as to improve punching
Relative moving speed between head and die casting, is conducive to improve the quality of shearing, while avoids die casting because of translational speed mistake
Harmful effect caused by the inertia formed soon.
Preferably, the shift drive mechanism includes being arranged on the driving plate below fixed plate, the lower surface of driving plate
It is bonded with the bottom surface of the cavity, the upper surface of driving plate is bonded with the lower surface of fixed plate, and fixed plate is bonded with driving plate
Face is inclined-plane, and driving plate thickness is equipped with rotatable drive gear disk beside thicker side, is hinged with driving plate horizontal
Connecting rod, the other end of connecting rod are hinged on the edge away from driving plate side in drive gear disk, the drive gear disk with one by
Motor-driven change gear is driven to be meshed.
The hinged connecting rod in both ends forms toggle with drive gear disk, when driving motor drives change gear to rotate
When, you can drive drive gear disk to rotate, and then driving plate transverse shifting is promoted by connecting rod, at this time the inclined upper table of driving plate
Face can drive fixed plate to move up.Since connecting rod in initial position is horizontally disposed, that is to say, that connecting rod at this time is in down
Dead-centre position, therefore, the translational speed of driving plate is slower when drive gear disk just starts to rotate, correspondingly, the rising of fixed plate
Speed is slower, so as to fulfill the slow start of die casting；With the rotation of drive gear disk, the rate of climb of die casting progressively increases
Add；When drive gear disk turns over about 90 degree or so, the rate of climb of die casting reaches maximum, at this time punch just with it is auxiliary
Forming part is helped to contact, so as to form THE ADIABATIC SHEAR IN, to improve the smoothness of notch；When drive gear disk is rotated further, pressure
The rate of climb of casting is gradually decrease to stop, and impacts and shakes caused by rapidly stopping so as to effectively reducing die casting
It is dynamic.
Preferably, between driving plate and fixed plate and it is respectively equipped with straight line between driving plate and the bottom surface of cavity and leads
Rail, is equipped with rotatable roller beside the thicker side of the fixed plate thickness, and the roller reclines the side of the fixed plate.
Due to being respectively equipped with line slideway between driving plate and fixed plate and between driving plate and the bottom surface of cavity, thus
Frictional resistance during driving plate transverse shifting is significantly decreased, while realizes the mobile guide of driving plate.And roller then can be to solid
Fixed board forms a lateral support, to eliminate because driving plate makes lateral force caused by fixed plate what fixed plate was formed
Moment of torsion, avoids fixed plate from catching phenomenon occur when rising.
Therefore, the present invention has the advantages that：Force unbalance problem during product ejection can effectively be improved, from
And avoid product from being deformed in ejection, be conducive to improve the Forming Quality of large-scale die casting part.
Brief description of the drawings
Fig. 1 is a kind of partial structural diagram of the compression mod of the present invention.
The structure diagram of die casting with assistant formation portion during Fig. 2.
Fig. 3 is the structure diagram of the assistant ejector pin of lower die.
Fig. 4 is a kind of structure diagram that the cutting shape of the present invention is put.
In figure：1st, rack 2, mobile mould 21, cavity 22, guide through hole 23, synchronous rod through-hole 3, stent 31, punching
First 4, fixed plate 41, guide rod 42, die casting locating piece 5, synchronizing bar 51, supporting block 511, locating slot 52, limited block
53rd, support spring 6, driving plate 61, line slideway 62, roller 7, drive gear disk 71, change gear 72, connecting rod 8,
Lower die 80, upper mold 801, location hole 81, secondary cavity 82, main auxiliary mandril 83, balance ejection casing 84, balancing pole
841st, taper guide head 85, lower mold fixed plate 86, mandril fixed plate 87, mandril 88, cavity 89, top plate 9, die casting
91st, assistant formation portion.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1 and Figure 2, a kind of forming method of large aluminum alloy die casting, it is lower outer it is suitable for having in lower surface
The large-scale die casting shown up, positioned at the surface of lower die side when lower surface herein refers to shaping, positioned at upper when being correspondingly molded
The surface of mould side is upper surface, is specifically comprised the following steps：
（1）To be molded the compression mod of die casting upper mold 80 on process be adapted to the upper surface of die casting it is upper
Mold forming region, processes the lower die forming area being adapted to the lower surface of die casting in lower die 8；
（2）The lower exposed face side position that die casting is corresponded on the die joint of lower die processes and lower die forming area
The secondary cavity 81 of edge connection, secondary cavity position is corresponded in lower die and sets assistant ejector pin；
（3）Upper and lower mould is installed on die casting machine and molds upper and lower mould, at this time the upper and lower common structure in mold forming region
Into the cavity 88 of compression mod, the liquid aluminium alloy of high temperature enters cavity and secondary cavity and cold by the running gate system in upper mold
But it is molded, so as to mold die casting 9 in cavity, an auxiliary being connected with the edge of die casting is molded in secondary cavity
Forming part 91；
（4）Upper and lower mould separates, the ejecting mechanism action in lower die, mandril 87 and the assistant ejector pin being arranged in lower die
Die casting lower surface and assistant formation portion is promoted to move together, so that die casting is separated with core；
（5）The die casting with assistant formation portion is removed, and assistant formation portion is removed with cutter device, you can has been obtained
Whole die casting.
Preferably, secondary cavity is in flat strip, and substantially vertical with lower die forming area edge, so as to as far as possible
Reduce the notch on the die casting for removing assistant formation portion, and easy to the cutting in assistant formation portion.It is understood that die casting
Mould belongs to the prior art, therefore, not left further to the conventional structure of the compression mods such as running gate system, cooling system in the present embodiment
Description.
In order to avoid assistant formation portion produces bending deformation in ejection, assistant ejector pin of the invention includes what is be arranged side by side
Main auxiliary mandril 82 and balance ejection casing 83, main auxiliary mandril are located in secondary cavity close to the edge of lower die forming area
Side, balance ejection casing are located at the edge side away from lower die forming area in secondary cavity, sliding in balance ejection casing
Balancing pole 84 is set dynamicly, conical location hole 801 corresponding with balancing pole is set on the die joint of upper mold, balances ejector sleeve
The upper surface of pipe is flushed with the bottom surface of secondary cavity, and the upper end that balancing pole stretches out balance ejection casing sets what is be adapted to location hole
Taper guide head 841.In this way, when upper and lower mould molds shaping die casting, taper guide head is fitted in location hole, by aiding in
The assistant formation portion parcel balancing pole that mold cavity forming goes out；When mandril promotes die casting lower surface to move up die casting, put down
Weighing apparatus ejection casing promotes assistant formation portion synchronously to be moved up together with die casting with main auxiliary mandril, and balancing pole maintains at this time
Motionless, the Bao Moli between assistant formation portion and balancing pole forms one to assistant formation portion downward active force, at this time
Assistant formation portion is subject to the downward traction action power of die casting in the side of main auxiliary mandril, and assistant formation portion is on main auxiliary top
The opposite side of bar is subject to the downward active force of balancing pole so that assistant formation portion left-right balance and avoiding produce it is upward curved
Folding, and assistant formation portion can be made to produce enough ejecting forces to die casting.
Fixed for the ease of the installation of assistant ejector pin, as shown in figure 3, the ejecting mechanism bag being arranged in the present invention in lower die
Lower mold fixed plate 85, mandril fixed plate 86 moving up and down, the top plate 89 being fixed on the downside of mandril fixed plate are included, balancing pole
Lower end is fixed in lower mold fixed plate, and the lower end of mandril, main auxiliary mandril and balance ejection casing is then fixed on mandril and fixes
On plate, in this way, when ejecting mechanism acts, the balancing pole being fixed in lower mold fixed plate can remain motionless, and be fixed on mandril and consolidate
The mandril of fixed board, main auxiliary mandril, balance ejection casing then can in the next lifting of promotion of top plate, so as to fulfill die casting with
The synchronous ejection in assistant formation portion.
Set as shown in figure 4, being put in the present invention removing the cutting shape in assistant formation portion including rack 1, the lower part of rack
A mobile mould 2 moving up and down is put, the top of rack sets a stent 3.Set in stent and be used to be punched die casting
The punch 31 in the assistant formation portion of part, moves and mobile positioning apparatus is set on mould and positioned at mobile positioning apparatus side
Discontinuous positioner.In addition, setting a cavity 21 in the lower part of mobile mould, mobile positioning apparatus includes flatly setting
Fixed plate 4 and the shift drive mechanism associated with fixed plate in cavity, shift drive mechanism can drive fixed plate to become
Speed lifting.Some guide rods 41 straight up are set in fixed plate, corresponding guide through hole 22, guide rod are set on mobile mould
It is slidably located in corresponding guide through hole, mobile mould upper surface is stretched out in the upper end of guide rod, and in the upper end of guide rod
Portion sets the die casting locating piece 42 being adapted to the surface configuration of die casting.In addition, discontinuous positioner includes vertical status
In setting corresponding synchronous rod through-hole 23 on the synchronizing bar 5 in cavity, mobile mould, synchronizing bar is slidably located on synchronous rod through-hole
Interior, mobile mould upper surface is stretched out in the upper end of synchronizing bar, and sets supporting block 51, the upper table of supporting block in the upper end of synchronizing bar
The locating slot 511 being adapted to assistant formation portion is set on face, to place and to be navigated on mobile positioning apparatus when die casting
When, synchronizing bar can be positioned in the locating slot of supporting block.In addition, it is located at one evagination of middle part setting in cavity in synchronizing bar
Limited block 52, an and support spring 53 is arranged in the lower end of synchronizing bar, the upper end of support spring against limited block so that
Limited block flexibly reclines the lower surface of fixed plate.
Further, shift drive mechanism of the invention includes being arranged on driving plate 6 below fixed plate, under driving plate
Surface is bonded with the bottom surface of cavity, and the upper surface of driving plate is bonded with the lower surface of fixed plate, so that fixed plate is in upper and lower
Obtain the secure support of driving plate upwards.In addition, the binding face of fixed plate and driving plate is inclined-plane, so that fixed plate and drive
Movable plate is in split shape.Drive and rotatable drive gear disk 7 is set beside the thicker right side of plate thickness, it is one hinged in driving plate
Horizontally disposed connecting rod 8, left end and the driving plate of connecting rod are hinged, and the right end of connecting rod is hinged in drive gear disk away from driving
At the right side edge of plate, drive gear disk is with one by driving motor（Not shown in figure）The change gear 71 of drive is meshed, from
And make driving motor that change gear can be driven to rotate, and then drive drive gear disk to rotate.
The step of being put in the present invention with cutting shape when removing assistant formation portion is as follows：
A. the die casting 9 with assistant formation portion 91 is placed and navigated to the portable positioning being arranged on mobile mould
On device, the die casting locating piece of the guide rod upper end of mobile positioning apparatus and the surface of die casting fit, so that pressure
Casting is reliably supported and positioned；And the assistant formation portion for being connected to the flat-shaped of die casting left side edge then navigates to
It is arranged on mobile mould and on the discontinuous positioner on the left of mobile positioning apparatus, and assistant formation portion is limited
In the locating slot of the supporting block of the synchronizing bar upper end of discontinuous positioner, mobile mould at this time is in position of readiness.
B. the driving electric motor starting in shift drive mechanism, so as to drive drive gear disk is positive to turn by change gear
Dynamic, the connecting rod hinged with drive gear disk can drive driving plate to move to the left at this time, and then by oblique on the upside of driving plate
Face promotes fixed plate to move up, and fixed plate can drive guide rod to move up, and then promotes the die casting for being positioned at guide rod upper end
Die casting on part locating piece moves up, and at the same time, the elastic force of support spring promotes synchronizing bar synchronously to be moved up with fixed plate, synchronous
Limited block on bar then reclines the lower surface of fixed plate all the time, so that it is guaranteed that the supporting block of synchronizing bar upper end reclines all the time auxiliary into
Type portion, makes assistant formation portion synchronously rise with die casting and is reliably supported, so as to fulfill mobile positioning apparatus and
The synchronization action of disconnected formula positioner.
The connecting rod of the present invention, drive gear disk and driving plate form toggle, since connecting rod in initial position is
Horizontally disposed, that is to say, that connecting rod at this time is in lower dead point position, and therefore, drive gear disk just starts to drive when rotating
The transverse shifting speed of plate is slower, and correspondingly, the rate of climb of fixed plate is slower, so as to fulfill on the slow start of die casting
Rise；With the rotation of drive gear disk, the rate of climb of die casting is stepped up, so as to fulfill die casting and assistant formation portion
Sync plus white rises.When drive gear disk turns over about 90 degree or so, the transverse shifting speed of driving plate reaches maximum, phase
Ying Di, the rate of climb of die casting reach maximum, and die casting and assistant formation portion uplink synchronization move at this time to clipped position
The punch in stent above mould is just contacted with assistant formation portion.
In addition, we can set left and right respectively between driving plate and fixed plate and between the bottom surface of driving plate and cavity
The line slideway 61 of arrangement, so that frictional resistance when reducing driving plate transverse shifting, while realize the mobile guide of driving plate.
And rotatable roller 62 is set beside the thicker left side of fixed plate thickness, and roller reclines the left surface of fixed plate.So as to
A lateral support can be formed to fixed plate, to eliminate because driving plate makes fixed plate to lateral force caused by fixed plate
The moment of torsion of formation, avoids fixed plate from catching phenomenon occur when rising.
C. the driving motor in running fix device continues to drive driving plate transverse shifting to the left, so as to drive die casting
Continue uplink, and punch then prevents assistant formation portion from continuing uplink, and synchronization is made by the supporting block in discontinuous positioner
Bar stops uplink, and the lower surface of limited block and fixed plate on synchronizing bar is separated, and assistant formation portion is clamped, is positioned at punch
Between the supporting block of discontinuous positioner, so that relative displacement is formed between die casting and punch, at this time on punch
Cutting edge is that pair assistant formation portion being connected with die casting shears.
It should be noted that in order to improve shear rate during punch punching assistant formation portion, to improve shearing quality, I
An oil cylinder can be set in stent（Not shown in figure）, the piston rod of oil cylinder is connected with punch, in this way, in movable type
During positioner drives die casting and assistant formation portion uplink synchronization to clipped position with discontinuous positioner, we
It can move down the hydraulic oil cylinder driving punch in stent, so that punch forms opposite fortune with die casting and assistant formation portion
It is dynamic.In addition, set on punch with the corresponding escape groove 311 of locating slot in supporting block, close to the right side of die casting in escape groove
Side is the cutting edge for forming shearing assistant formation portion.In this way, work as running fix device band dynamic pressure casting uplink and punch versus downstream
To punch cutting edge with assistant formation portion when clipped position is in contact, locating slot in the both sides of escape groove and supporting block on punch
Two side contacts, punch is pushed assistant formation portion and supporting block and is moved down, and promotes synchronizing bar to overcome by supporting block
The elastic force of support spring and move down so that form relative displacement between die casting and punch, the cutting edge on punch at this time
I.e. pair assistant formation portion being connected with die casting is quickly sheared.
D. motor is driven to drive drive gear disk to be rotated further by change gear, until connecting rod is in upper dead center position,
Connecting rod at this time is in horizontality, and connecting rod and the hinge joint of drive gear disk are located at the left side of drive gear disk, at this time
The die casting being positioned on running fix device goes upward to upper extreme position, and the cutting edge of punch is completed to cut assistant formation portion
Cut, so that assistant formation portion and die casting phase separation, assistant formation portion is clamped, is positioned at punch and discontinuous positioner
Supporting block between, correspondingly, punch comes downwards to the lower limit position of punch；
E. motor is driven to drive drive gear disk to be rotated further by change gear, connecting rod crosses upper dead center position, so that
Drive driving plate transverse shifting to the right, running fix device and die casting then can be under the action of own wts to moving down
Dynamic, we can also be arranged compression spring on the guide bar certainly, and compression spring one end compresses fixed plate upper surface, and the other end compresses the upper of cavity
Surface.So when driving plate promotes fixed plate to move up, compression spring is compressed, and when driving plate transverse shifting to the right, compression spring is
Fixed plate downlink can be promoted, and die casting downlink is made by the guide rod in fixed plate.At the same time, hydraulic oil cylinder driving punch moves up
And with assistant formation part from when running fix device band dynamic pressure casting comes downwards to clipped position, punch is moved upward to punching
Head upper extreme position and reset.Limited block on the lower surface contact guide rod of fixed plate at this time, so that discontinuous positions
Device action, the discontinuous positioner i.e. DL synchronization together with running fix device；
F. when running fix device and discontinuous positioner DL synchronization to lower limit position, die casting is positioned at
On the die casting locating piece of running fix device, assistant formation portion separated with die casting is positioned on discontinuous positioner simultaneously
It is separated with punch；
G. die casting is removed from running fix device, assistant formation portion is removed from discontinuous positioner, you can
To complete die casting.
The movement moved up and down as a kind of prioritization scheme, the mobile mould of driving that we can set oil cylinder a kind of in rack
Mould driving mechanism, so that moving moulds has nethermost position of readiness, and the operating position after rising, we can set shifting
Dynamic model, which is in, has larger gap between position of readiness and stent, so as to easily be placed die casting and navigate to shifting
On dynamic formula positioner.In this way, we can be further added by step between step a and step b as follows：
The mobile mobile mould of mould driving mechanism driving rises together with mobile positioning apparatus and discontinuous positioner, from
And mobile mould is risen to operating position by position of readiness, the assistant formation portion on discontinuous positioner is positioned at this time with moving
The distance between cutting edge of punch in stent above dynamic model is 50-70mm, its preferred value is 60mm, so as to reduce
The oscilaltion stroke of mobile positioning apparatus and discontinuous positioner, is positioned with improving mobile positioning apparatus and discontinuous
The intensity and rigidity of device；
Correspondingly, to be further added by step between step f and step g as follows：
The mobile mobile mould of mould driving mechanism driving is dropped to together with mobile positioning apparatus and discontinuous positioner
Position of readiness.
Claims (7)
1. a kind of forming method of large aluminum alloy die casting, the lower surface of the die casting has lower exposed face, it is characterized in that,
Include the following steps：
To be molded the upper die forming region for processing in the upper mold of the compression mod of die casting and being adapted to the upper surface of die casting,
The lower die forming area being adapted to the lower surface of die casting is processed in lower die；
The lower exposed face side position that die casting is corresponded on the die joint of lower die processes and is connected with lower die forming area edge
Secondary cavity, corresponded in lower die secondary cavity position set assistant ejector pin；
Upper and lower mould is installed on die casting machine and molds upper and lower mould, upper and lower mold forming region collectively forms compression mod at this time
Cavity, the liquid aluminium alloy of high temperature enters cavity and secondary cavity by the running gate system in upper mold and is cooled and shaped, from
And die casting is molded in cavity, an assistant formation portion being connected with the edge of die casting is molded in secondary cavity；
Upper and lower mould separates, and the ejecting mechanism action in lower die, the mandril and assistant ejector pin being arranged in lower die is promoted under die casting
Surface and assistant formation portion move together, so that die casting is separated with core；
The die casting with assistant formation portion is removed, and assistant formation portion is removed with cutter device, you can obtains complete die casting
Part；
The assistant ejector pin includes the main auxiliary mandril being arranged side by side and balance ejection casing, main auxiliary mandril are located under
The edge side in mold forming region, balance ejection casing is located remotely from the edge side of lower die forming area, in balance ejector sleeve
Balancing pole is slidably set in pipe, and the die joint of upper mold is equipped with conical location hole corresponding with balancing pole, balance ejection
The upper surface of casing is flushed with the bottom surface of secondary cavity, and the upper end of balancing pole stretching balance ejection casing is equipped with to be adapted to location hole
Taper guide head, when upper and lower mould mold be molded when, taper guide head is fitted in location hole, is molded by secondary cavity
Wrap up balancing pole in assistant formation portion；When mandril and assistant ejector pin promote die casting lower surface and assistant formation portion to move together
When, balancing pole remains motionless, and balances ejection casing and then promote assistant formation portion to move together with main auxiliary mandril.
2. a kind of forming method of large aluminum alloy die casting according to claim 1, it is characterized in that, gone with cutter device
The step of during except assistant formation portion, is as follows：
A. the die casting with assistant formation portion is placed and navigates to a mobile positioning apparatus being arranged on mobile mould
On, the assistant formation portion at die casting edge, which then navigates to, to be arranged on mobile mould and positioned at the interruption of mobile positioning apparatus side
On formula positioner, mobile mould at this time is in position of readiness；
B. mobile positioning apparatus is acted with discontinuous positioner, so as to drive die casting and assistant formation portion uplink synchronization
To clipped position, assistant formation portion at this time is in contact with the punch in the stent above mobile mould；
C. discontinuous positioner stops uplink, assistant formation portion is clamped, be positioned at punch and discontinuous positioner it
Between, running fix device then drives die casting to continue uplink, so that forming relative displacement between die casting and punch, rushes at this time
Cutting edge on head is that pair assistant formation portion being connected with die casting shears；
D. running fix device band dynamic pressure casting goes upward to upper extreme position, and the cutting edge of punch is completed to cut assistant formation portion
Cut so that assistant formation portion and die casting phase separation, assistant formation portion is clamped, is positioned at punch and discontinuous positioner
Between；
E. running fix device band dynamic pressure casting comes downwards to clipped position, discontinuous positioner action, so that and running fix
Device DL synchronization together；
F. running fix device and discontinuous positioner DL synchronization to lower limit position, die casting at this time are positioned at shifting
On dynamic positioning system, assistant formation portion separated with die casting is positioned on discontinuous positioner and is separated with punch；
G. die casting is removed from running fix device, assistant formation portion is removed from discontinuous positioner, you can obtained
Whole die casting.
3. a kind of forming method of large aluminum alloy die casting according to claim 2, it is characterized in that, in step a and step
It is as follows to increase step between rapid b：
The mobile mobile mould of mould driving mechanism driving rises to work together with mobile positioning apparatus and discontinuous positioner
Position, is positioned at the assistant formation portion on discontinuous positioner and the cutting edge of the punch in the stent above mobile mould at this time
The distance between be 50-70mm；
Correspondingly, it is as follows to increase step between step f and step g：
The mobile mobile mould of mould driving mechanism driving drops to standby together with mobile positioning apparatus and discontinuous positioner
Position.
4. a kind of forming method of large aluminum alloy die casting according to claim 2, it is characterized in that, the mobile mould
Lower part is equipped with cavity, the mobile positioning apparatus include the fixed plate being arranged in cavity and with the associated speed change of fixed plate
Driving mechanism, fixed plate are equipped with some guide rods straight up, guide rod stretch out mobile mould upper surface end be equipped with
The die casting locating piece of the surface configuration adaptation of die casting；The discontinuous positioner includes being positioned vertically within same in cavity
Bar is walked, the end that synchronizing bar stretches out mobile mould upper surface is equipped with supporting block, and supporting block is equipped with determines with what assistant formation portion was adapted to
Position groove, the middle part that synchronizing bar is located in cavity are equipped with the limited block of evagination, and the lower end of synchronizing bar is arranged with support spring, supports bullet
The upper end of spring is against limited block, the lower surface of fixed plate so that limited block flexibly reclines.
5. a kind of forming method of large aluminum alloy die casting according to claim 4, it is characterized in that, positioned in movable type
During device drives die casting and assistant formation portion uplink synchronization to clipped position with discontinuous positioner, in stent
Punch move down, when assistant formation portion is in contact with the cutting edge of punch, punch and the supporting block in support assistant formation portion
It is in contact, running fix device band dynamic pressure casting continues uplink, and punch then pushes assistant formation portion and supporting block, and passes through branch
Bracer promotes synchronizing bar to overcome the elastic force of support spring and move down, so that forming opposite position between die casting and punch
Move, the cutting edge on punch is that pair assistant formation portion being connected with die casting shears at this time；In running fix device band dynamic pressure
During casting comes downwards to clipped position, punch moves up reset.
6. a kind of forming method of large aluminum alloy die casting according to claim 4, it is characterized in that, the variable speed drives
Mechanism includes being arranged on the driving plate below fixed plate, and the lower surface of driving plate is bonded with the bottom surface of the cavity, driving plate
Upper surface is bonded with the lower surface of fixed plate, and the binding face of fixed plate and driving plate is inclined-plane, the thicker side of driving plate thickness
Side is equipped with rotatable drive gear disk, is hinged with horizontal connecting rod in driving plate, the other end of connecting rod is hinged on sliding tooth
Edge away from driving plate side on wheel disc, the drive gear disk is with one by driving motor-driven change gear to be meshed.
7. a kind of forming method of large aluminum alloy die casting according to claim 6, it is characterized in that, driving plate and fixation
Line slideway, the thicker side side of the fixed plate thickness are respectively equipped between plate and between driving plate and the bottom surface of cavity
Equipped with rotatable roller, the roller reclines the side of the fixed plate.
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| CN201610791755.7A CN106345981B (en) | 2016-08-31 | 2016-08-31 | A kind of forming method of large aluminum alloy die casting |
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| CN201610791755.7A CN106345981B (en) | 2016-08-31 | 2016-08-31 | A kind of forming method of large aluminum alloy die casting |
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| JP7047237B2 (en) * | 2018-03-15 | 2022-04-05 | 三井金属アクト株式会社 | Manufacturing method of door hinges for automobiles and automobiles |
| CN111843378A (en) * | 2019-04-30 | 2020-10-30 | 华孚精密科技(马鞍山)有限公司 | Metal part machining method and metal part |
| CN111906496A (en) * | 2019-05-08 | 2020-11-10 | 华孚精密科技(马鞍山)有限公司 | Die casting manufacturing method and die casting |
| CN110681832B (en) * | 2019-10-18 | 2020-12-22 | 贵州安吉航空精密铸造有限责任公司 | Casting forming process method of special-shaped casting |
| CN111570732A (en) * | 2020-05-29 | 2020-08-25 | 芜湖市容川机电科技股份有限公司 | Preparation method of nodular cast iron injection molding machine fixing plate |
| CN113523234B (en) * | 2021-06-08 | 2023-11-17 | 山东利信新材料有限公司 | Lightweight aluminum alloy die casting die |
| CN113618035A (en) * | 2021-08-06 | 2021-11-09 | 莆田市荣兴机械有限公司 | Local extrusion device of horizontal die casting machine and extrusion and ejection method thereof |
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| US6631752B2 (en) * | 2000-06-29 | 2003-10-14 | Diecast Software Inc. | Mathematically determined solidification for timing the injection of die castings |
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Denomination of invention: A Forming Method for Large Aluminum Alloy Die Castings Effective date of registration: 20230707 Granted publication date: 20180511 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Ningbo Beilun sub branch Pledgor: NINGBO HUANYA MANUFACTORY Co.,Ltd. Registration number: Y2023980047763 |
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