CN106345981A - Forming method for large aluminum alloy die-casting fitting - Google Patents
Forming method for large aluminum alloy die-casting fitting Download PDFInfo
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- CN106345981A CN106345981A CN201610791755.7A CN201610791755A CN106345981A CN 106345981 A CN106345981 A CN 106345981A CN 201610791755 A CN201610791755 A CN 201610791755A CN 106345981 A CN106345981 A CN 106345981A
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- die casting
- formation portion
- die
- assistant formation
- mould
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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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- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a forming method for a large aluminum alloy die-casting fitting. First, an upper die forming region is machined on an upper die, and a low die forming region is machined on a lower die; an auxiliary cavity is machined in the position, corresponding to the lower exposed face of the die-casting fitting, of the parting face of the lower die, and an auxiliary ejector rod is arranged in the auxiliary cavity; when the upper die and the lower die are closed, the upper die forming region and the lower die forming region jointly construct a cavity of a die-casting die, a die-casting fitting is formed inside the cavity, and an auxiliary forming portion connected with the edge of the die-casting fitting is formed inside the auxiliary cavity; then, an ejector rod arranged on the lower die and the auxiliary ejector rod push the die-casting fitting and the auxiliary forming portion to move together, so that the die-casting fitting is separated from a cavity core; the die-casting fitting with the auxiliary forming portion is taken down, and the complete die-casting fitting can be obtained after the auxiliary forming portion is removed through a cutting device. The unbalanced stress when the product is ejected out can be effectively improved, in this way, deformation generated when the product is ejected out is avoided, and the forming quality of the large die-casting fitting is easily improved.
Description
Technical field
The present invention relates to aluminum alloy die-casting technological technical field, especially relate to a kind of molding 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, and it is plastic complex-shaped
Component of machine, and substantial amounts of machining time can be saved, reduce the loss of material simultaneously, be conducive to improving and produce effect
Rate, is suitable for producing in enormous quantities.Aluminium alloy compression casting needs first to process a set of die casting, and die casting has a upper mould and one
Lower mould it is generally the case that arrange on upper mould the cavity that is adapted to product design and and cavity connect enter running channel, in lower mould
The core of upper setting and product cavity adaptation and corresponding ejecting mechanism, after upper and lower mould is installed on die casting machine simultaneously matched moulds, on
Chamber portion between the core of the cavity of mould and lower mould and form die cavity for shaped article, the liquid that die casting machine will melt
By entering running channel injection type intracavity, after waiting the liquid aluminium alloy cooling and shaping in die cavity, upper and lower mould separates aluminium alloy, molding
Die casting relies on the Bao Moli that cooling meat is formed to rest on the core of lower mould, this ejecting mechanism action on mould at present, will
The product resting on the core of lower mould ejects upwards, so that product is separated with core, you can take off product.For example, one
Plant disclosed in Chinese patent literature " there is the die casting of exhaust apparatus ", application publication number is cn101850412a, its
Including upper die and lower die, lower mold backing plate and push rod, die casting machine nozzle is located at upper mould top, upper with what this die casting machine nozzle had a common boundary
It is provided with the die cavity communicating and runner between mould and lower mould, be provided with, in lower mould, the exhaust apparatus communicating with die cavity, this exhaust apparatus bag
Include overflowing well, aerofluxuss piece and discharge duct.
In order to ensure the quality of product exposed face, we generally the exposed face of die casting are arranged on upper mould, and will be outer
Appearance quality requires relatively low medial surface to be arranged on the lower mould with ejecting mechanism, is arranged on push rod non-outer on product simultaneously
Show up position, so that product is ejected by product after shaping by the push rod of lower mould, without staying on the exposed face of product
The vestige of push rod.But some medial surface or downside are also had to the product of part exposed face, particularly some profile chis
Very little larger large-scale die casting part, due to cannot arrange push rod with this exposed face correspondence position on lower mould, thus easily cause top
The discontinuity equalization of product when going out, makes product eject difficult, or causes product to be deformed because of discontinuity equalization.
Content of the invention
The invention aims to solve prior art die casting molding method existing for cannot be right on lower mould
The exposed face position answering product arranges push rod, thus leading to force unbalance, product yielding problem during product ejection, provides
A kind of forming method of large aluminum alloy die casting, can improve force unbalance problem during product ejection, effectively thus keeping away
Exempt from product to be deformed in ejection, be conducive to improving the Forming Quality of large-scale die casting part.
To achieve these goals, the present invention employs the following technical solutions:
A kind of forming method of large aluminum alloy die casting, the lower surface of described die casting has lower exposed face, specifically include as
Lower step:
(1). the upper die forming being adapted to the upper surface of die casting is processed on the upper mould of the compression mod in order to molding die casting
Region, processes the lower mold forming region being adapted to the lower surface of die casting on lower mould；
(2). on the die joint of lower mould, the lower exposed face side position of corresponding die casting processes and lower mold forming edges of regions
The secondary cavity of connection, corresponding secondary cavity position setting assistant ejector pin on lower mould；
(3). upper and lower mould is installed on die casting machine and makes upper and lower mould matched moulds, now upper and lower mold forming region collectively forms pressure
The die cavity of mold, the liquid aluminium alloy of high temperature enters die cavity and secondary cavity by the running gate system on upper mould and is cooled to
Type, thus molding die casting in die cavity, molds an assistant formation being connected with the edge of die casting in secondary cavity
Portion；
(4). upper and lower mould separates, the ejecting mechanism action on lower mould, and the push rod being arranged on lower mould and assistant ejector pin promote pressure
Foundry goods lower surface and assistant formation portion move together, so that die casting is separated with core；
(5). take off the die casting with assistant formation portion, and remove assistant formation portion with cutter sweep, you can obtain complete
Die casting.
The present invention passes through on the die joint of lower mould near the lower mold forming regional location setting auxiliary that cannot arrange push rod
Die cavity, and corresponding assistant ejector pin is set at secondary cavity, in molding, one and die casting at secondary cavity, can be molded
The assistant formation portion that part is connected, this assistant formation portion constitutes 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, it is to avoid the difficulty of die casting ejection and because of discontinuity equalization during ejection
The deformation of products easily occurring.After being ejected Deng die casting, removable assistant formation portion, so that it is guaranteed that expose under die casting
Face does not have the vestige of push rod.
Preferably, described assistant ejector pin includes the main auxiliary push rod being arranged side by side and balance ejection sleeve pipe, main auxiliary
Push rod is located at the edge side near lower mold forming region, and balance ejection sleeve pipe is located remotely from the edge one in lower mold forming region
Side, slidably arranges the gimbal lever in balance ejection sleeve pipe, and the die joint of upper mould is provided with cone corresponding with the gimbal lever
Location hole, the upper surface of balance ejection sleeve pipe is flushed with the bottom surface of secondary cavity, and the upper end of balance ejection sleeve pipe is stretched out by the gimbal lever
It is provided with the taper guide head being adapted to location hole, when upper and lower mould matched moulds molding, taper guide head fits in positioning in the hole, by
The parcel gimbal lever of assistant formation portion that secondary cavity molds；When push rod and assistant ejector pin promote die casting lower surface and auxiliary
When forming part moves together, the gimbal lever remains motionless, and balances ejection sleeve pipe and then promote assistant formation together with main auxiliary push rod
Portion moves.
For the ease of the cutting in assistant formation portion, the thickness in assistant formation portion can not be too thick, so, when assistant formation portion and
When die casting ejects together, one end is hanging thus the assistant formation portion in cantilever beam-like easily produces because of the thrust of assistant ejector pin
It is folded upward at.For this reason, the present invention is in the side setting balance ejection sleeve pipe of the main auxiliary push rod in order to eject assistant formation portion, and
The gimbal lever is set in balance ejection sleeve pipe, so that assistant formation portion is wrapped in the gimbal lever.When the promotion of main auxiliary push rod is auxiliary
When helping forming part to move up, the Bao Moli between assistant formation portion and the gimbal lever forms a downward work to assistant formation portion
Firmly, assistant formation portion now is subject to the downward traction action power of die casting, assistant formation in the side of main auxiliary push rod
Portion main auxiliary push rod opposite side be subject to the gimbal lever downward active force so that assistant formation portion left-right balance and avoid
Produce bending upwards, and assistant formation portion can be made to produce enough ejecting forces to die casting.
Preferably, the step being removed during assistant formation portion with cutter sweep is as follows:
A. the die casting with assistant formation portion is placed and navigate to the mobile positioning apparatus being arranged on mobile mould
On, the assistant formation portion at die casting edge then navigates to the interruption being arranged on mobile mould and being located at mobile positioning apparatus side
On formula positioner, mobile mould now is in position of readiness；
B. mobile positioning apparatus and discontinuous positioner action, thus drive die casting and assistant formation portion uplink synchronization
To clipped position, assistant formation portion now is contacted with the drift in the stent above mobile mould；
C. discontinuous positioner stops up, assistant formation portion is clamped, be positioned at drift and discontinuous positioner it
Between, it is up that running fix device then drives die casting to continue, so that forming relative displacement between die casting and drift, now rushes
Cutting edge on head is sheared to the assistant formation portion being connected with die casting；
D. running fix device band dynamic pressure foundry goods goes upward to upper extreme position, and the cutting edge of drift completes assistant formation portion is cut
Cut so that assistant formation portion and die casting are separated, assistant formation portion is clamped, is positioned at drift and discontinuous positioner
Between；
E. running fix device band dynamic pressure foundry goods comes downwards to clipped position, discontinuous positioner action, thus and running fix
Device DL synchronization together；
F., to lower limit position, die casting now is positioned at shifting for running fix device and discontinuous positioner DL synchronization
On dynamic positioning system, assistant formation portion detached with die casting is positioned on discontinuous positioner and is separated with drift；
G. take off die casting from running fix device, assistant formation portion is taken off from discontinuous positioner, you can obtained
Whole 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 is that is to say, that assistant formation portion is in no longer cantilever beam state in shearing, but is clamped, is positioned at drift and discontinuous
Between positioner, so that assistant formation portion is not in bending phenomenon in shear history, it is effectively prevented from becoming because of auxiliary
The bending in type portion and make the otch of die casting that torn grain to occur.Particularly, the present invention passes through the portable positioning that can move up
Device and discontinuous positioner make die casting rise together with assistant formation portion, thus forming relative displacement with drift, and
When drift is contacted with assistant formation portion, discontinuous positioner no longer promotes assistant formation portion to rise, and portable positioning dress
Put, continue to press on die casting and rise, so that the cutting edge of drift forms good shearing to assistant formation portion, and die casting
Do not slow down in shearing, thus can avoid because effect of inertia leads to the reduction of relative velocity between drift and die casting during shearing,
Advantageously ensure that the smooth of die casting otch.
Preferably, it is as follows to increase step between step a and step b:
Mobile mould drive mechanism drives mobile mould to rise to work together with mobile positioning apparatus and discontinuous positioner
Position, is now positioned at the assistant formation portion on discontinuous positioner and the cutting edge of the drift in the stent above mobile mould
The distance between be 50-70mm；
Correspondingly, increase step between step f and step g as follows:
It is standby that mobile mould drive mechanism drives mobile mould to drop to together with mobile positioning apparatus and discontinuous positioner
Position
So, when mobile mould is in position of readiness, between stent and mobile mould, can have larger space, thus convenient will
Die casting is placed and is navigated on mobile positioning apparatus.When start shearing when, first will move mould rise, with reduce mobile mould and
The distance between stent, then makes mobile positioning apparatus and discontinuous positioner action again, promotes die casting and auxiliary
Forming part rises, thus the oscilaltion stroke of mobile positioning apparatus and discontinuous positioner can be reduced, to improve movement
The intensity of formula positioner and discontinuous positioner and rigidity.
Preferably, the bottom of described mobile mould is provided with cavity, described mobile positioning apparatus include being arranged in cavity
Fixed plate and the shift drive mechanism associating with fixed plate, fixed plate is provided with some guide posts straight up, guiding
The end that bar stretches out mobile mould upper surface is provided with the die casting locating piece being adapted to the surface configuration of die casting；Described discontinuous is fixed
Position device includes the synchronizing bar being positioned vertically within cavity, and the end that synchronizing bar stretches out mobile mould upper surface is provided with support block,
Bracer is provided with the locating slot being adapted to assistant formation portion, and the middle part that synchronizing bar is located in cavity is provided with the limited block of evagination, with
Step bar lower end be arranged with support spring, the upper end of support spring against limited block the fixation so that limited block flexibly reclines
The lower surface of plate.
Because die casting is located on the die casting locating piece that several are adapted to the surface configuration of die casting, because
This, when shift drive mechanism drives fixed plate to move up, fixed plate can drive moves on guide post, and then promotes die casting
Upper shifting, meanwhile, the elastic force of support spring promotes and moves in synchronizing bar and fixed plate synchronization, and the limited block on synchronizing bar is then all the time
The lower surface of the fixed plate that reclines.When the assistant formation portion contact drift in the support block of synchronizing bar upper end, shift drive mechanism
Drive fixed plate to continue up, and assistant formation portion and support block are then subject to the prevention of drift to stop up, so that punching
Head forms shear action to die casting, and support spring now then forms one to the assistant formation portion in support block and support block
Individual support, it is to avoid assistant formation portion produces bending.When shift drive mechanism drives fixed plate to be moved downward to clipped position, Gu
The lower surface of fixed board is contacted with limited block, thus driving synchronizing bar to overcome the elastic force of support spring synchronously to move down reset.Due to
The rising of synchronizing bar is to realize soft drive by support spring, rigid drive mechanism therefore can be avoided to drive easy during synchronizing bar
The Stroke Control error occurring.
Preferably, driving on die casting and the synchronization of assistant formation portion with discontinuous positioner in mobile positioning apparatus
To clipped position, the drift in stent moves down row, when assistant formation portion is contacted with the cutting edge of drift,
Drift is contacted with the support block supporting assistant formation portion, and the continuation of running fix device band dynamic pressure foundry goods is up, and drift is then pushed
Assistant formation portion and support block, and promote synchronizing bar to overcome the elastic force of support spring to move down by support block, thus
Make to be formed relative displacement between die casting and drift, now the cutting edge on drift is entered to the assistant formation portion being connected with die casting
Row shearing；During running fix device band dynamic pressure foundry goods comes downwards to clipped position, drift moves up reset.
Drift can be driven by mechanisms such as oil cylinders, and during due to moving on die casting, drift also moves down simultaneously, thus punching can be improved
Relative moving speed between head and die casting, is conducive to improving the quality of shearing, avoids die casting because of translational speed mistake simultaneously
The harmful effect caused by inertia being formed soon.
Preferably, described shift drive mechanism includes being arranged on the driving plate below fixed plate, the lower surface of driving plate
Fit with the bottom surface of described cavity, the upper surface of driving plate is fitted with the lower surface of fixed plate, fixed plate is fitted with driving plate
Face is inclined-plane, and the side side driving plate thickness thicker is provided with rotatable drive gear disk, driving plate is hinged with level
Connecting rod, the other end of connecting rod is hinged on the edge away from driving plate side in drive gear disk, this drive gear disk with one by
The change-speed gearing that motor drives is meshed.
The hinged connecting rod in two ends forms toggle with drive gear disk, when motor drives change-speed gearing to rotate
When, you can drive drive gear disk to rotate, and then driving plate transverse shifting is promoted by connecting rod, the upper table that now driving plate tilts
Face can drive to be moved in fixed plate.Because connecting rod is horizontally disposed that is to say, that under connecting rod now is in initial position
Dead-centre position, therefore, when drive gear disk just starts to rotate, the translational speed of driving plate is slower, correspondingly, the rising of fixed plate
Speed is slower, thus realizing the slow start of die casting；With the rotation of drive gear disk, the rate of climb of die casting progressively increases
Plus；When drive gear disk turns over about 90 degree about, the rate of climb of die casting reaches maximum, now drift just with auxiliary
Forming part is helped to contact, thus THE ADIABATIC SHEAR IN can be formed, to improve the smoothness of otch；When drive gear disk is rotated further, pressure
The rate of climb of foundry goods is gradually decrease to stop, thus die casting can be reduced effectively because rapidly stopping the impact that causes and shaking
Dynamic.
Preferably, be respectively equipped with straight line between driving plate and fixed plate and between driving plate and the bottom surface of cavity leading
Rail, the thicker side side of described fixing plate thickness is provided with rotatable roller, and described roller reclines the side of described 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
Significantly decrease frictional resistance during driving plate transverse shifting, realize the mobile guide of driving plate simultaneously.And roller then can be to solid
Fixed board forms a lateral support, lateral force produced by fixed plate is made fixed plate formed to eliminate because of driving plate
Moment of torsion, it is to avoid fixed plate catching phenomenon when rising.
Therefore, the invention has the following beneficial effects: force unbalance problem during product ejection can be improved effectively, from
And avoid product to be deformed in ejection, be conducive to improving the Forming Quality of large-scale die casting part.
Brief description
Fig. 1 is a kind of partial structural diagram of the compression mod of the present invention.
There is during Fig. 2 the structural representation of the die casting in assistant formation portion.
Fig. 3 is the structural representation of the assistant ejector pin of lower mould.
Fig. 4 is a kind of cutting structural representation of putting of shape of the present invention.
In figure: 1, frame 2, mobile mould 21, cavity 22, guide through hole 23, synchronous rod through-hole 3, stent 31, punching
4, fixed plate 41, guide post 42, die casting locating piece 5, synchronizing bar 51, support block 511, locating slot 52, limited block
53rd, support spring 6, driving plate 61, line slideway 62, roller 7, drive gear disk 71, change-speed gearing 72, connecting rod 8,
Lower mould 80, upper mould 801, location hole 81, secondary cavity 82, main auxiliary push rod 83, balance ejection sleeve pipe 84, the gimbal lever
841st, taper guide head 85, lower mold fixed plate 86, push rod fixed plate 87, push rod 88, die cavity 89, top board 9, die casting
91st, assistant formation portion.
Specific embodiment
The present invention will be further described with specific 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, its be applied to have in lower surface lower outer
The large-scale die casting shown up, lower surface herein refers to be located at the surface of lower mould side during molding, is correspondingly located at upper during molding
The surface of mould side is upper surface, specifically includes following steps:
(1). the upper mould being adapted to the upper surface of die casting is processed on the upper mould 80 of the compression mod in order to molding die casting and becomes
Type region, processes the lower mold forming region being adapted to the lower surface of die casting on lower mould 8；
(2). on the die joint of lower mould, the lower exposed face side position of corresponding die casting processes and lower mold forming edges of regions
The secondary cavity 81 of connection, corresponding secondary cavity position setting assistant ejector pin on lower mould；
(3). upper and lower mould is installed on die casting machine and makes upper and lower mould matched moulds, now upper and lower mold forming region collectively forms pressure
The die cavity 88 of mold, the liquid aluminium alloy of high temperature enters die cavity and secondary cavity by the running gate system on upper mould and is cooled to
Type, thus molding die casting 9 in die cavity, molds an assistant formation being connected with the edge of die casting in secondary cavity
Portion 91；
(4). upper and lower mould separates, the ejecting mechanism action on lower mould, and the push rod 87 being arranged on lower mould and assistant ejector pin promote
Die casting lower surface and assistant formation portion move together, so that die casting is separated with core；
(5). take off the die casting with assistant formation portion, and remove assistant formation portion with cutter sweep, you can obtain complete
Die casting.
Preferably, secondary cavity is in flat strip, and substantially vertical with lower mold forming edges of regions, thus can try one's best
Reduce the otch on the die casting removing assistant formation portion, and be easy to the cutting in assistant formation portion.It is understood that die casting
Mould belongs to 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, the assistant ejector pin of the present invention includes being arranged side by side
Main auxiliary push rod 82 and balance ejection sleeve pipe 83, main auxiliary push rod is located at the edge in secondary cavity near lower mold forming region
Side, balance ejection sleeve pipe is located at the edge side away from lower mold forming region in secondary cavity, sliding in balance ejection sleeve pipe
The gimbal lever 84 is set dynamicly, and on the die joint of upper mould, the location hole 801 of setting cone corresponding with the gimbal lever, balances ejector sleeve
The upper surface of pipe is flushed with the bottom surface of secondary cavity, and the upper end setting that balance ejection sleeve pipe stretches out in the gimbal lever is adapted to location hole
Taper guide head 841.So, when upper and lower mould matched moulds molding die casting, taper guide head fits in positioning in the hole, by assisting
The parcel gimbal lever of assistant formation portion that mold cavity forming goes out；When push rod promotes die casting lower surface so that die casting is moved up, put down
Weighing apparatus ejection sleeve pipe and main auxiliary push rod promote assistant formation portion synchronously to move up together with die casting, and now the gimbal lever maintains
Motionless, the Bao Moli between assistant formation portion and the gimbal lever forms a downward active force to assistant formation portion, now
Assistant formation portion is subject to the downward traction action power of die casting in the side of main auxiliary push rod, and assistant formation portion is on main auxiliary top
The opposite side of bar is subject to the downward active force of the gimbal lever so that assistant formation portion left-right balance and avoiding produce upwards curved
Folding, and assistant formation portion can be made to produce enough ejecting forces to die casting.
Installation for the ease of assistant ejector pin is fixed, as shown in figure 3, the ejecting mechanism bag being arranged in the present invention on lower mould
Include lower mold fixed plate 85, push rod fixed plate 86 moving up and down, be fixed on top board 89 on the downside of push rod fixed plate, the gimbal lever
Lower end is fixed in lower mold fixed plate, and the lower end that push rod, main auxiliary push rod eject sleeve pipe with balance is then fixed on push rod and fixes
On plate, so, when determining ejecting mechanism action, the gimbal lever being fixed in lower mold fixed plate can remain motionless, and is fixed on push rod
The push rod of fixed plate, main auxiliary push rod, balance ejection sleeve pipe then can be in next lifting of the promotion of top board, thus realizing die casting
Synchronization ejection with assistant formation portion.
As shown in figure 4, putting including frame 1 in order to remove the cutting shape in assistant formation portion in the present invention, the bottom of frame sets
Put a mobile mould 2 moving up and down, the top of frame arranges a stent 3.It is provided in stent being punched die casting
The drift 31 in the assistant formation portion of part, mobile mould arranges mobile positioning apparatus and is located at mobile positioning apparatus side
Discontinuous positioner.Additionally, arranging a cavity 21 in the bottom of mobile mould, mobile positioning apparatus include flatly arranging
Fixed plate 4 in cavity and the shift drive mechanism being associated with fixed plate, shift drive mechanism can drive fixed plate to become
Speed lifting.Some guide posts 41 straight up are arranged on fixed plate, mobile mould arranges corresponding guide through hole 22, guide post
It is slidably located in corresponding guide through hole, mobile mould upper surface is stretched out in the upper end of guide post, and the upper end in guide post
The die casting locating piece 42 that portion's setting is adapted to the surface configuration of die casting.In addition, discontinuous positioner includes vertical status
Synchronizing bar 5 in cavity, mobile mould arranges synchronous rod through-hole 23 accordingly, and 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 arranges support block 51, the upper table of support block in the upper end of synchronizing bar
On face, the locating slot 511 being adapted to assistant formation portion is set, so that when die casting is placed and navigates on mobile positioning apparatus
When, synchronizing bar can be positioned in the locating slot of support block.Further, the middle part being located in cavity in synchronizing bar arranges an evagination
Limited block 52, and in the sheathed support spring 53 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, the shift drive mechanism of the present invention includes being arranged on the driving plate 6 below fixed plate, under driving plate
Fitted with the bottom surface of cavity in surface, the upper surface of driving plate is fitted 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, fixed plate is inclined-plane with the binding face of driving plate, so that fixed plate and drive
Dynamic plate is all in splitting shape.Drive the thicker right side side of plate thickness that rotatable drive gear disk 7 is set, hinged one in driving plate
Horizontally disposed connecting rod 8, the left end of connecting rod and driving plate are hinged, and the right-hand member of connecting rod is hinged in drive gear disk away from driving
At the right side edge of plate, the change-speed gearing 71 that drive gear disk is driven by motor (not shown) with is meshed, from
And make motor that change-speed gearing can be driven to rotate, and then drive gear disk is driven to rotate.
The step put when removing assistant formation portion with cutting shape in the present invention is as follows:
A. the die casting 9 with assistant formation portion 91 is placed and navigate to the mobile positioning apparatus being arranged on mobile mould
On, the die casting locating piece of the guide post upper end of mobile positioning apparatus and the surface of die casting fit, so that die casting
Reliably supported and positioned；And the assistant formation portion being connected to the flat-shaped of die casting left side edge then navigates to setting
On discontinuous positioner on the left of on mobile mould and positioned at mobile positioning apparatus, and between assistant formation portion is limited in
In the locating slot of the support block of synchronizing bar upper end of disconnected formula positioner, mobile mould now is in position of readiness.
B. the motor in shift drive mechanism starts, thus being driven by change-speed gearing, drive gear disk is positive to be turned
Dynamic, now hinged with drive gear disk connecting rod can drive driving plate side shifting to the left, and then relies on oblique on the upside of driving plate
Face promotes fixed plate to move up, and fixed plate can drive moves on guide post, and then promotes the die casting being positioned at guide post upper end
Move on die casting on part locating piece, meanwhile, the elastic force of support spring promotes and moves in synchronizing bar and fixed plate synchronization, synchronous
Limited block on bar then reclines the lower surface of fixed plate all the time, so that it is guaranteed that the support block of synchronizing bar upper end reclines all the time and assists into
Type portion, makes assistant formation portion synchronously rise and reliably supported with die casting, thus realize 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, because connecting rod in initial position is
Horizontally disposed that is to say, that connecting rod now is in lower dead point position, therefore, drive gear disk has just started to drive when rotating
The transverse shifting speed of plate is slower, and correspondingly, the rate of climb of fixed plate is slower, thus realizing 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, thus realizing die casting and assistant formation portion
Sync plus white rises.When drive gear disk turns over about 90 degree about, the transverse shifting speed of driving plate reaches maximum, phase
Ying Di, the rate of climb of die casting reaches maximum, and die casting and assistant formation portion uplink synchronization, to clipped position, now move
The drift in stent above mould is just contacted with assistant formation portion.
In addition, we can be respectively provided with left and right between driving plate and fixed plate and between the bottom surface of driving plate and cavity
The line slideway 61 of arrangement, thus reducing frictional resistance during driving plate transverse shifting, realizes the mobile guide of driving plate simultaneously.
And rotatable roller 62 is set on the thicker left side side of fixing plate thickness, roller reclines the left surface of fixed plate.Thus
A lateral support can be formed to fixed plate, because of driving plate, fixed plate be made to lateral force produced by fixed plate to eliminate
The moment of torsion being formed, it is to avoid fixed plate catching phenomenon when rising.
C. the motor in running fix device continues to drive driving plate transverse shifting to the left, thus driving die casting
Continue up, and drift then stops the continuation of assistant formation portion up, and synchronization is made by the support block in discontinuous positioner
Bar stopping is up, and the limited block on synchronizing bar is separated with the lower surface of fixed plate, and assistant formation portion is clamped, is positioned at drift
And the support block of discontinuous positioner between, so that forming relative displacement between die casting and drift, now on drift
Cutting edge is sheared to the assistant formation portion being connected with die casting.
It should be noted that in order to improve shear rate during drift punching assistant formation portion, to improve shearing quality, I
An oil cylinder (not shown) can be arranged on stent, the piston rod of oil cylinder is connected with drift, so, in movable type
Positioner and discontinuous positioner drive die casting and assistant formation portion uplink synchronization to clipped position, we
The hydraulic oil cylinder driving drift in stent can be made to move down, so that drift forms relative fortune with die casting and assistant formation portion
Dynamic.Additionally, the escape groove 311 corresponding with the locating slot in support block is arranged on drift, near the right side of die casting in escape groove
Side forms the cutting edge in shearing assistant formation portion.So, when running fix device band dynamic pressure foundry goods is up drift versus downstream
To drift cutting edge with assistant formation portion when clipped position contacts, locating slot in the both sides of escape groove and support block on drift
Two side contacts, assistant formation portion pushed by drift and support block moves down, and by support block promote synchronizing bar overcome
The elastic force of support spring and move down so that between die casting and drift formed relative displacement, the now cutting edge on drift
The assistant formation portion being connected with die casting is quickly sheared.
D. motor drives drive gear disk to be rotated further by change-speed gearing, until connecting rod is in upper dead center position,
Connecting rod now is in horizontality, and the pin joint of connecting rod and drive gear disk is located at the left side of drive gear disk, now
The die casting being positioned on running fix device goes upward to upper extreme position, and the cutting edge of drift completes assistant formation portion is cut
Cut, so that assistant formation portion and die casting are separated, assistant formation portion is clamped, is positioned at drift and discontinuous positioner
Support block between, correspondingly, drift comes downwards to the lower limit position of drift；
E. motor drives drive gear disk to be rotated further by change-speed gearing, and upper dead center position crossed by connecting rod, thus driving
Driving plate transverse shifting to the right, running fix device and die casting then can move down in the presence of own wt, when
So we also can sheathed stage clip on the guide bar, stage clip one end compresses fixed plate upper surface, and the other end compresses the upper surface of cavity.
So when driving plate promotes and moves in fixed plate, stage clip is compressed, and when driving plate transverse shifting to the right, stage clip can promote
Fixed plate is descending, and makes die casting descending by the guide post in fixed plate.Meanwhile, on hydraulic oil cylinder driving drift move and with auxiliary
Help moulding section from when running fix device band dynamic pressure foundry goods comes downwards to clipped position, drift is moved upward to the upper of drift
Extreme position and reset.Now the lower surface of fixed plate contacts the limited block on guide post, so that discontinuous positioner moves
Make, discontinuous positioner i.e. DL synchronization together with running fix device；
F., when running fix device and discontinuous positioner DL synchronization are to lower limit position, die casting is positioned at movement
On the die casting locating piece of positioner, assistant formation portion detached with die casting be positioned on discontinuous positioner and with punching
Head is separated；
G. take off die casting from running fix device, assistant formation portion is taken off from discontinuous positioner, you can obtained
Whole die casting.
As a kind of prioritization scheme, we can arrange the movement that the mobile mould of driving of oil cylinder one class moves up and down in frame
Mould drive mechanism, so that moving moulds have nethermost position of readiness, and the operating position after rising, we can arrange shifting
Dynamic model is in has larger space between position of readiness and stent, thus easily die casting being placed and navigating to shifting
On dynamic formula positioner.So, we can be further added by step between step a and step b as follows:
Mobile mould drive mechanism drives mobile mould to rise together with mobile positioning apparatus and discontinuous positioner, so that
Mobile mould rises to operating position by position of readiness, is now positioned at the assistant formation portion on discontinuous positioner and mobile mould
The distance between cutting edge of drift in the stent of top is 50-70mm, and its preferred value is 60mm, thus movement can be reduced
The oscilaltion stroke of formula positioner and discontinuous positioner, to improve mobile positioning apparatus and discontinuous positioner
Intensity and rigidity；
Correspondingly, it is further added by step between step f and step g as follows:
It is standby that mobile mould drive mechanism drives mobile mould to drop to together with mobile positioning apparatus and discontinuous positioner
Position.
Claims (8)
1. a kind of forming method of large aluminum alloy die casting, the lower surface of described die casting has lower exposed face, it is characterized in that,
Comprise the steps:
(1). the upper die forming being adapted to the upper surface of die casting is processed on the upper mould of the compression mod in order to molding die casting
Region, processes the lower mold forming region being adapted to the lower surface of die casting on lower mould；
(2). on the die joint of lower mould, the lower exposed face side position of corresponding die casting processes and lower mold forming edges of regions
The secondary cavity of connection, corresponding secondary cavity position setting assistant ejector pin on lower mould；
(3). upper and lower mould is installed on die casting machine and makes upper and lower mould matched moulds, now upper and lower mold forming region collectively forms pressure
The die cavity of mold, the liquid aluminium alloy of high temperature enters die cavity and secondary cavity by the running gate system on upper mould and is cooled to
Type, thus molding die casting in die cavity, molds an assistant formation being connected with the edge of die casting in secondary cavity
Portion；
(4). upper and lower mould separates, the ejecting mechanism action on lower mould, and the push rod being arranged on lower mould and assistant ejector pin promote pressure
Foundry goods lower surface and assistant formation portion move together, so that die casting is separated with core；
(5). take off the die casting with assistant formation portion, and remove assistant formation portion with cutter sweep, you can obtain complete
Die casting.
2. a kind of forming method of large aluminum alloy die casting according to claim 1, is characterized in that, described assistant ejector pin
Including the main auxiliary push rod being arranged side by side and balance ejection sleeve pipe, main auxiliary push rod is located at the edge near lower mold forming region
Side, balance ejection sleeve pipe is located remotely from the edge side in lower mold forming region, slidably arranges flat in balance ejection sleeve pipe
Weighing apparatus bar, the die joint of upper mould is provided with the location hole of cone corresponding with the gimbal lever, the upper surface of balance ejection sleeve pipe with auxiliary
The bottom surface helping die cavity flushes, and the upper end that balance ejection sleeve pipe stretches out in the gimbal lever is provided with the taper guide head being adapted to location hole, when
During upper and lower mould matched moulds molding, taper guide head fits in positioning in the hole, and the assistant formation portion parcel being molded by secondary cavity is flat
Weighing apparatus bar；When push rod is when assistant ejector pin promotes and moves together with die casting lower surface and assistant formation portion, the gimbal lever remains motionless,
And balance ejection sleeve pipe and then promote assistant formation portion to move together with main auxiliary push rod.
3. a kind of forming method of large aluminum alloy die casting according to claim 1, is characterized in that, gone with cutter sweep
Except step during assistant formation portion is as follows:
A. the die casting with assistant formation portion is placed and navigate to the mobile positioning apparatus being arranged on mobile mould
On, the assistant formation portion at die casting edge then navigates to the interruption being arranged on mobile mould and being located at mobile positioning apparatus side
On formula positioner, mobile mould now is in position of readiness；
B. mobile positioning apparatus and discontinuous positioner action, thus drive die casting and assistant formation portion uplink synchronization
To clipped position, assistant formation portion now is contacted with the drift in the stent above mobile mould；
C. discontinuous positioner stops up, assistant formation portion is clamped, be positioned at drift and discontinuous positioner it
Between, it is up that running fix device then drives die casting to continue, so that forming relative displacement between die casting and drift, now rushes
Cutting edge on head is sheared to the assistant formation portion being connected with die casting；
D. running fix device band dynamic pressure foundry goods goes upward to upper extreme position, and the cutting edge of drift completes assistant formation portion is cut
Cut so that assistant formation portion and die casting are separated, assistant formation portion is clamped, is positioned at drift and discontinuous positioner
Between；
E. running fix device band dynamic pressure foundry goods comes downwards to clipped position, discontinuous positioner action, thus and running fix
Device DL synchronization together；
F., to lower limit position, die casting now is positioned at shifting for running fix device and discontinuous positioner DL synchronization
On dynamic positioning system, assistant formation portion detached with die casting is positioned on discontinuous positioner and is separated with drift；
G. take off die casting from running fix device, assistant formation portion is taken off from discontinuous positioner, you can obtained
Whole die casting.
4. a kind of forming method of large aluminum alloy die casting according to claim 3, is characterized in that, in step a and step
Increase step as follows between rapid b:
Mobile mould drive mechanism drives mobile mould to rise to work together with mobile positioning apparatus and discontinuous positioner
Position, is now positioned at the assistant formation portion on discontinuous positioner and the cutting edge of the drift in the stent above mobile mould
The distance between be 50-70mm；
Correspondingly, increase step between step f and step g as follows:
It is standby that mobile mould drive mechanism drives mobile mould to drop to together with mobile positioning apparatus and discontinuous positioner
Position.
5. a kind of forming method of large aluminum alloy die casting according to claim 3, is characterized in that, described mobile mould
Bottom is provided with cavity, and described mobile positioning apparatus include the fixed plate being arranged in cavity and the speed change associating with fixed plate
Drive mechanism, fixed plate is provided with some guide posts straight up, guide post stretch out mobile mould upper surface end be provided with
The die casting locating piece of the surface configuration adaptation of die casting；Described discontinuous positioner includes being positioned vertically within same in cavity
Step bar, the end that synchronizing bar stretches out mobile mould upper surface is provided with support block, and support block is provided with and determining that assistant formation portion is adapted to
Position groove, the middle part that synchronizing bar is located in cavity is provided 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 against limited block the lower surface of fixed plate so that limited block flexibly reclines.
6. a kind of forming method of large aluminum alloy die casting according to claim 5, is characterized in that, in portable positioning
Device and discontinuous positioner drive die casting and assistant formation portion uplink synchronization to clipped position, in stent
Drift move down, when assistant formation portion is contacted with the cutting edge of drift, drift with support assistant formation portion support block
Contact, the continuation of running fix device band dynamic pressure foundry goods is up, and drift then pushes assistant formation portion and support block, and by propping up
Bracer promotes synchronizing bar to overcome the elastic force of support spring to move down, so that forming relative position between die casting and drift
Move, now the cutting edge on drift is sheared to the assistant formation portion being connected with die casting；In running fix device band dynamic pressure
During foundry goods comes downwards to clipped position, drift moves up reset.
7. a kind of forming method of large aluminum alloy die casting according to claim 5, is characterized in that, described variable speed drives
Mechanism includes being arranged on the driving plate below fixed plate, and the lower surface of driving plate is fitted with the bottom surface of described cavity, driving plate
Upper surface is fitted with the lower surface of fixed plate, and fixed plate is inclined-plane with the binding face of driving plate, drives the thicker side of plate thickness
Side is provided with rotatable drive gear disk, and driving plate is hinged with the connecting rod of level, and the other end of connecting rod is hinged on sliding tooth
Away from the edge of driving plate side on wheel disc, this drive gear disk is meshed by the change-speed gearing that motor drives with one.
8. a kind of forming method of large aluminum alloy die casting according to claim 7, is characterized in that, driving plate and fixation
It is respectively equipped with line slideway, the thicker side side of described fixing plate thickness between plate and between driving plate and the bottom surface of cavity
It is provided with rotatable roller, described roller reclines the side of described fixed plate.
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| CN110681832A (en) * | 2019-10-18 | 2020-01-14 | 贵州安吉航空精密铸造有限责任公司 | Casting forming process method of special-shaped casting |
| CN111051637A (en) * | 2018-03-15 | 2020-04-21 | 三井金属爱科特株式会社 | Method for manufacturing door hinge for automobile and automobile |
| 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 |
| 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 |
| CN113523234A (en) * | 2021-06-08 | 2021-10-22 | 马伟明 | 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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| CN106345981B (en) | 2018-05-11 |
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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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