CN106964734A - T-piece semisolid die forging forming technology - Google Patents
T-piece semisolid die forging forming technology Download PDFInfo
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- CN106964734A CN106964734A CN201710312525.2A CN201710312525A CN106964734A CN 106964734 A CN106964734 A CN 106964734A CN 201710312525 A CN201710312525 A CN 201710312525A CN 106964734 A CN106964734 A CN 106964734A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/004—Thixotropic process, i.e. forging at semi-solid state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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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
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
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Abstract
The present invention relates to a kind of T-piece semisolid die forging forming technology, technique described in described technique need to be machined using T-shaped part die forging system, aluminum-base composite semi-solid blank is prepared using mechanical mixing method, semi-solid blank is heated 50 minutes at a temperature of secondary remelting, semi-solid alloy is poured into the T-shaped part mould cavity of accommodating semi-solid blank, alloy fills the vertical cylinder of T-shaped part axis, liquid underfill is carried out at the first pressure, punch pressure, which is less than or equal to, is pressed in left slider, hydraulic piston on right sliding block, continue loading drift after the solidification of aluminum-base composite semi-solid blank under second pressure, the metal part solidified is set to promote described left slider, right sliding block is displaced outwardly, described left slider, right sliding block is reached behind setting position, stop drift loading, by be plastically deformed complete two axis horizontals it is not isometrical column part shaping；Wherein, first pressure is less than second pressure.
Description
Technical field
The present invention relates to a kind of T-piece semisolid die forging forming technology.
Background technology
Although liquid forging combines conventional cast, the advantage of forging, but still is the shaping based on solidification, therefore with
The forging that solid die forging is produced in performance compared to a certain distance is remained, and main cause is that amount of plastic deformation is small,
Structural state is not the fine grained texture through deformation.In order to improve the performance of two kinds of forming technique products, some scholars carry in recent years
Go out using base is first cast, then carry out common hot forging, this method is only applicable to simple shape part, and main purpose is section
About material.
In view of above-mentioned defect, the design people is actively subject to research and innovation, to found a kind of T-piece semisolid die forging
Forming technology, makes it with more the value in industry.
The content of the invention
In order to solve the above technical problems, being improved it is an object of the invention to provide one kind and accurate control liquid forging product group
Knit the T-piece semisolid die forging forming technology of performance.
T-piece semisolid die forging forming technology of the present invention, described technique need to be machined using T-shaped part die forging system,
Wherein described T-shaped part die forging system includes：Semisolid dispensing Preparation equipment and forging die forming equipment, the forging die forming equipment
Including：T-shaped part mould, pressure actuated device, the T-shaped part mould at least include it is T-shaped into component, it is described T-shaped to include into component：
Punch-pin, left cavity plate, right cavity plate and left slider, right sliding block, press the hydraulic pressure being provided with to live respectively on described left slider, right sliding block
Plug；The described left slider of the pressure actuated device control, the movement of right sliding block, and by adjusting the pressure of pressure actuated device
Size realizes different speed；
Described technique at least comprises the following steps：
Aluminum-base composite semi-solid blank is prepared using mechanical mixing method, including：Select matrix material 2A50 forging aluminium alloys, increase
Strong body material is SiCp particles, wherein, SiCp grains degree is 7 μm, volume fraction 7.5%；
SiCp particles are pre-processed, standby reinforcement particle is obtained；
Melting 2A50 aluminium alloys：With crucible for smelting aluminium alloy to 640 DEG C~660 DEG C, refining agent is added, after refining 5 minutes
Slagging-off, is stirred, and move up and down during slagging-off to aluminum alloy melt；
1.5wt%~2wt% pure Mg is added in aluminum alloy melt；
SiCp particles are preheated：SiCp particles are wrapped up with 10g aluminium foils, 600 are heated in the crucible for being put into heating furnace
DEG C, and 30min is incubated to 60min；
First the SiCp particles after preheating are added in stirring crucible, aluminum alloy melt is then added, is heated, when temperature plus
Start stirring at hot to more than 680 DEG C, after insulation more than 30min, during stirring, according to the material content regulation stirring rod in crucible
Upper-lower position, change stirring rod direction of rotation after often stirring 3 to 10 minutes, by heating and temperature control at 680 DEG C to 700 DEG C,
Stirring rod persistently stirs 40 to 60min with 875r/min；
Composite is poured into press molding in the blank mold of preheating, blank mold preheating temperature by stirring immediately after terminating
For 300~350 DEG C, the dwell time is 0.5-1min/mm, obtains aluminum-base composite semi-solid blank；
The temperature of aluminum-base composite semi-solid blank secondary remelting is set, the secondary remelting temperature is that the temperature causes aluminium base
Corresponding temperature when the fraction solid of compound semi-solid blank is 60% to 90%, by semi-solid blank secondary remelting temperature
Lower heating 50 minutes, semi-solid alloy is poured into the T-shaped part mould cavity of accommodating semi-solid blank, and alloy fills T-shaped part axle
The vertical cylinder of line, carries out liquid underfill at the first pressure, and punch pressure, which is less than or equal to, is pressed in left slider, on right sliding block
Hydraulic piston, drift loading velocity be 15mm/s, drift loading after the completion of pressurize 20s, aluminum-base composite semi-solid blank solidification
Continue to load drift under second pressure afterwards, make the metal part solidified promote described left slider, right sliding block to be displaced outwardly,
Described left slider, right sliding block are reached behind setting position, stop drift loading, two axis horizontals are completed not by being plastically deformed
The shaping of isometrical ground column part；Wherein, first pressure is less than second pressure.
Further, the T-shaped part mould includes the backing plate that lower template is fixed on by plug screw in lower template, opposed in institute
The cavity plate fixed cover on backing plate is stated, the left cavity plate, right cavity plate are connected to the cavity plate and fixed by left flange, right flange respectively
Put, the left slider is arranged on the left cavity plate, the right sliding block is arranged on the right sliding block, in described left cunning
Press the hydraulic piston being provided with block, right sliding block respectively, described punch-pin and left cavity plate, right female die single-side gap be 0.06 to
0.1mm；
Also include the punch retainer that cope plate is bolted on cope plate, the punch retainer and cope plate
Between be provided with convex mould pad.
Further, gradient is provided between cavity plate and cavity plate die sleeve.
Further, pressure actuated device includes：Fuel tank, hydraulic pump, overflow valve, choke valve, reversal valve and hydraulic cylinder；Open
After dynamic, by the pressure of throttle valve adjustment oil pressure, oil cylinder piston movement is driven with differently speed, continued until meeting forcing press
Untill stroke after pressure, pressure actuated device is controlled left and right two sliding blocks by two oil cylinders.
Further, in addition to fixed connection apparatus, the fixed connection apparatus includes：The retainer ring that parallel spacing is set
And shift(ing) ring, described retainer ring, shift(ing) ring be connected with two guide pillars, and the guide pillar is provided with screw thread, the shift(ing) ring
The guide pillar below the screw thread for being provided with and coordinating in screw thread on the guide pillar in guide pin bushing, the guide pin bushing, the guide pin bushing is arranged with to be provided with
Nut, described shift(ing) ring is got up by two threaded guide pillars and nut support, the hydraulic cylinder of the pressure actuated device
It is arranged on the shift(ing) ring, the shift(ing) ring by threaded adjusting height, can control the center of hydraulic cylinder and T-shaped part mould
The center of left and right sliding block is in same level height.
Further, T-shaped part die forging system also includes：Hydraulic press, heating furnace, temperature controller, temperature of silicon controlled rectifier instrument；Using can
Controlling temperature instrument and open type heating furnace are as heating fusing metal, and the power of open type heating furnace is 10kw, and temperature sensor material is
Nickel chromium triangle-nickel silicon alloy, using 4 Resistant heating blank molds；Install porcelain tube additional inside and outside resistance wire, and wrap up resistance in heating
The asbestos material of fire reduces the heat exchange of blank mold and environment；Blank is measured using XMT-101 temperature digital displays controller unit
The temperature of mould, the measurement range of temperature control equipment is 1-1300 degrees Celsius, and error is less than or equal to 1 degree Celsius；Coil voltage
380V, it is possible to achieve overvoltage and overcurrent protection；The hydraulic press is 2000KN liquid-state die forging hydraulic press.
Further, the T-shaped part mould is lubricated using machine oil graphitic lubricant, is 5% by mass fraction
Graphite powder is added in the machine oil that mass fraction is 95%, with spray gun spraying in blank mold mold cavity surface after uniform stirring, its
Thickness is 0.05-0.1mm.
Further, the first pressure is 10MPa, 20MPa or 30MPa；The T-shaped material into component is
5CrNiMo。
Further, pretreatment is carried out to SiCp particles to specifically include：
Pickling：Pickling is carried out with 10% HF solution immersion SiCp particles 24h；
Cleaning：SiCp suspensions after pickling 24h are cleaned multiple times with a large amount of distilled water, single flash are changed within every 1~2 hour
Water, until solution reaches neutrality；
Drying：The clear water of SiCp liquid surfaces is removed, dried in drying baker under conditions of 140 DEG C~160 DEG C 24h~
28h；
Grinding：There is caking phenomenon in SiCp after drying, is ground with mortar, become it is powdered, after grinding
Sealing preserve；
Sintering：The SiCp handled by said process needs to sinter 2~3 hours under 800 DEG C of ± 5 DEG C of high temperature.
Further, described sintering process is specially：Crucible is put into heating furnace and is preheating to 100 DEG C~150 with stove
DEG C, SiCp particles are put into crucible with stove heat to 300 DEG C~400 DEG C, insulation 30min or so, and be stirred continuously；Heating
It is sintered to 800 DEG C, needs to be stirred continuously in sintering process；Cool to room temperature with the furnace.
By such scheme, T-piece semisolid die forging forming technology of the present invention at least has advantages below：
In a blank mold shape chamber, liquid metal completes to fill type, solidification first under a lower pressure effect, obtains
Obtain the blank close with formation of parts shape；Continuing to increase formed metal after pressure can force some active modules to produce shifting
It is dynamic, some blank mold spaces are discharged, while the plasticity for making pre- section of blank and realizing under pressure truly becomes
Shape, finally obtains formation of parts.This technology is to improving and accurately controlling liquid and semisolid die forging product structure property to have important
Meaning, is that automotive light weight technology and heavy-duty machinery, weaponry provide one high using lightweight aluminum-base composite semi-solid blank product
The near-net-shape technology based theoretical of effect, energy-conservation.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is the structural representation of die forging blank mold of the present invention；
Fig. 2 is the structural representation of pressure actuated device of the present invention；
Fig. 3 is the structural representation of fixed connection apparatus of the present invention；
Fig. 4 is T-piece semisolid die forging forming technology flow chart of the present invention；
1- cope plates；2- convex mould pads；3- punch-pin；4- punch retainers；5th, 10,17- bolts；6th, the left and right cavity plates of 9-；
7th, the left and right sliding blocks of 13-；8th, 11- left and right flanges；12- hydraulic pistons；14- cavity plate fixed covers；15- backing plates；16- lower templates；21-
Fuel tank；22- hydraulic pumps；23- overflow valves；24- choke valves；25- reversal valves；26- hydraulic cylinders；31- shift(ing) rings；32- guide pillars；33-
Guide pin bushing；35- retainer rings；36- nuts；37- rotation stops pin is determined.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Its technical principle of integration die forging of the invention is：In a Die, semi-solid-state metal first one compared with
Type, solidification are filled in the lower completion of low-pressure effect, obtain the blank close with formation of parts shape；Continue to increase formed gold after pressure
Category can force some active modules to produce movement, discharge some die spaces, while making pre- section of blank real under pressure
Show plastic deformation truly, finally obtain formation of parts.This technology is to improving and accurately controlling semisolid die forging system
Part structure property is significant, is that automotive light weight technology and heavy-duty machinery, weaponry provide one using alloy in lightweight product
Efficiently, the near-net-shape technology based theoretical of energy-conservation.
Referring to Fig. 1 to Fig. 4, a kind of T-piece semisolid die forging forming technology described in a preferred embodiment of the present invention is described
Technique at least comprise the following steps：
Described technique need to be machined using T-shaped part die forging system, wherein described T-shaped part die forging system includes：Half
Solid-state dispensing Preparation equipment and forging die forming equipment, the forging die forming equipment include：T-shaped part mould, pressure actuated device, institute
State T-shaped part mould at least include it is T-shaped into component, it is described T-shaped to include into component：Punch-pin, left cavity plate, right cavity plate and left slider,
Right sliding block, presses the hydraulic piston being provided with respectively on described left slider, right sliding block；Described in the pressure actuated device control
The movement of left slider, right sliding block, and realize different speed by adjusting the pressure size of pressure actuated device；
Described technique at least comprises the following steps：
Aluminum-base composite semi-solid blank is prepared using mechanical mixing method, including：Select matrix material 2A50 forging aluminium alloys, increase
Strong body material is SiCp particles, wherein, SiCp grains degree is 7 μm, volume fraction 7.5%；
SiCp particles are pre-processed, standby reinforcement particle is obtained；
Melting 2A50 aluminium alloys：With crucible for smelting aluminium alloy to 640 DEG C~660 DEG C, refining agent is added, after refining 5 minutes
Slagging-off, is stirred, and move up and down during slagging-off to aluminum alloy melt；
1.5wt%~2wt% pure Mg is added in aluminum alloy melt；
SiCp particles are preheated：SiCp particles are wrapped up with 10g aluminium foils, 600 are heated in the crucible for being put into heating furnace
DEG C, and 30min is incubated to 60min；
First the SiCp particles after preheating are added in stirring crucible, aluminum alloy melt is then added, is heated, when temperature plus
Start stirring at hot to more than 680 DEG C, after insulation more than 30min, during stirring, according to the material content regulation stirring rod in crucible
Upper-lower position, change stirring rod direction of rotation after often stirring 3 to 10 minutes, by heating and temperature control at 680 DEG C to 700 DEG C,
Stirring rod persistently stirs 40 to 60min with 875r/min；
Composite is poured into press molding in the blank mold of preheating, blank mold preheating temperature by stirring immediately after terminating
For 300~350 DEG C, the dwell time is 0.5-1min/mm, obtains aluminum-base composite semi-solid blank；
The temperature of aluminum-base composite semi-solid blank secondary remelting is set, the secondary remelting temperature is that the temperature causes aluminium base
Corresponding temperature when the fraction solid of compound semi-solid blank is 60% to 90%, by semi-solid blank secondary remelting temperature
Lower heating 50 minutes, semi-solid alloy is poured into the T-shaped part mould cavity of accommodating semi-solid blank, and alloy fills T-shaped part axle
The vertical cylinder of line, carries out liquid underfill at the first pressure, and punch pressure, which is less than or equal to, is pressed in left slider, on right sliding block
Hydraulic piston, drift loading velocity be 15mm/s, drift loading after the completion of pressurize 20s, aluminum-base composite semi-solid blank solidification
Continue to load drift under second pressure afterwards, make the metal part solidified promote described left slider, right sliding block to be displaced outwardly,
Described left slider, right sliding block are reached behind setting position, stop drift loading, two axis horizontals are completed not by being plastically deformed
The shaping of isometrical ground column part；Wherein, first pressure is less than second pressure.
Described technique need to be completed using T-shaped part die forging system, wherein described T-shaped part die forging system includes：T-shaped part
Mould, pressure actuated device, the T-shaped part mould at least include it is T-shaped into component, it is described T-shaped to include into component：Punch-pin, a left side are recessed
Mould, right cavity plate and left slider, right sliding block, press the hydraulic piston being provided with respectively on described left slider, right sliding block；The pressure
The described left slider of force driving device control, the movement of right sliding block, and realized by the pressure size for adjusting pressure actuated device
Different speed；
The simple T-piece of the present embodiment selected shape is as the typical parts of integrated die forging, and it is vertical that semisolid fills axis
Cylinder, two waney column parts of axis horizontal be added metal solidification after by plastic deformation form.One
Semisolid filling is completed during chemical conversion shape and completes plastic deformation again, so higher is required to building mortion, it is more complicated.
The present embodiment integration die forging system, including three major parts：It is blank mold part, pressure actuated device, solid
Determine attachment means.Blank mold part is the main body of building mortion；Pressure actuated device controls the movement of movable slider, and passes through
Adjust its pressure size and realize different speed；Fixed connection apparatus is to connect blank mold and pressure actuated device simultaneously
Blank mold moving core is set to be matched properly with hydraulic cylinder.
The main points of blank mold design are as follows：
(1) in the blank mold material liquid and semisolid die forging forming process of formation of parts, formation of parts and melting gold
Category contact, will absorb substantial amounts of heat, it is thus possible to because temperature is too high and causes intensity decreases, and this requires the material selected
With certain intensity, heat resistance and corrosion resistance.Appropriate heat treatment is carried out to blank mold steel to improve hardness, if hardness
Not enough, blank mold may be damaged.This experiment formation of parts selects 5CrNiMo.
(2) convex, recessed clearance of touching will be suitably.Concave, convex gap is too small, can be because of punch-pin and the rigging error of cavity plate generation
Collide or bite；Excessive, aluminum-base composite semi-solid blank liquation can then be sprayed by blank mold gap, 1. cause danger, 2.
Longitudinal overlap is produced, reduces pressure effect, moving down for drift is 3. hindered, build-up of pressure loss makes forging's block dimension not enough, and add
Acute blank mold damage, makes gap bigger, causes vicious circle.According to the unilateral gap of practical production experience be 0.06-0.1mm compared with
To be suitable.
(3) demolding structure can not directly eject product because the shape of part is limited using push rod, but need first to eject
Combined die, then combined die is opened take out forging part.Cavity plate is taken out for convenience simultaneously, in cavity plate and cavity plate die sleeve
Between need to design certain gradient.
(4) exhaust molten metal in itself and pours into during die cavity and will carry some gases secretly, if these gases are not arranged
Die cavity, can hinder metal to fill type, and causing to wrap up in gas, outer surface inside forging has bubble depression, has a strong impact on the quality mould of product.One
As under situation, blank mold will set steam vent.This experiment without but set steam vent, but utilize by clearance between matrix and punch general
Gas is discharged.
T-piece forming blank mold work principle：Shaping when, molten metal is poured into combined die first, compared with
Liquid underfill is carried out under the small pressure of drift 3, metal gradually solidifies in filling.Now, hydraulic press be less than to the power of drift or
Equal to control pressure outside movable slider, so sliding block is remained stationary as, black region is applied in die cavity holding figure.Continue intensified pressure,
Metal stock increases the pressure of movable slider, gradually more than control pressure outside movable slider, and the metal of formed part will
Sliding block 6,13 is promoted to be displaced outwardly, cavity shape produces change, cavity space becomes big, now fills the cylinder (φ 50) of formation
Compressive plastic deformation is produced, two horizontal columns (φ 20, φ 30) squeeze sub- shearing large plastometric set by variable diameter angle and formed.
In the present embodiment, (1) changes the control mode of moving core.Original design realizes control using spring, operationally,
One it is possible that failure and pressure increase with core displacement；Two be that control pressure is small；Three are spring element and install annex
Space-consuming is big, and can not obtain big core amount of movement, can become large in size blank mold to realize, therefore can be with
A set of hydraulic system is designed to replace original spring.
(2) increase gradient is to reduce the contact area of cavity plate and die sleeve on the outside of cavity plate, and with positioning finger setting, to control
The formation of overlap, and play a part of reducing the ejection resistance after shaping.
Pressure actuated device is made up of fuel tank, hydraulic pump, overflow valve, choke valve, six parts of reversal valve and hydraulic cylinder, figure
2 be its schematic diagram.After hydraulic system starts, by the pressure of throttle valve adjustment oil pressure, oil cylinder piston is driven with differently speed
It is mobile, untill meeting the stroke after forcing press continues to press.This set system is controlled left and right two cunnings by two oil cylinders
Block, because the right and left face of cylinder diameter is different, suffered pressure is also different, and we can be increased by this set system
More experimental condition changes, so as to more fully be studied integrated swaging technique.
In order to fixed and connection take over a job movable slider control oil hydraulic cylinder with forming blank mold design auxiliary equipment, such as Fig. 2
Shown.This set auxiliary equipment is made up of two inner and outer diameter identical large circles, by two threaded guide pillars and nut
Support.Annulus above can highly be made by threaded adjusting in center and the blank mold movable slider of control cylinder
The heart is in same level height.Oil hydraulic cylinder is secured on the annulus that this can be moved up and down.
To SiCpThe pretreatment of particle is carried out to improve its wetability with aluminium alloy, but simple processing
SiCpParticle is still it cannot be guaranteed that SiCpGood interface cohesion between particle and aluminium alloy, in addition it is also necessary to aluminium liquid composition, SiCpParticle
The technological parameters such as feed postition, stirring are strictly controlled.
(1)SiCpPreheat to make SiCpPreferably combined with aluminium liquid, SiCpNeed preheating.By predetermined composite volume
Fraction, by load weighted SiCpWrapped up with 10g aluminium foils, be put into stirring crucible bottom with stove heat to 600 DEG C, and be incubated
More than 30min.SiC can be fully removed at this temperaturepIn gas and moisture, and add aluminium liquid stirring when can reduce both
The temperature difference, beneficial to SiCpWetting between particle and aluminium liquid, makes SiCpBeing more evenly distributed in the base.
(2) smelting aluminium alloy --- with another crucible for smelting aluminium alloy to 640 DEG C~660 DEG C, add refining agent, essence
Refining is removed the gred after 5 minutes, and aluminium liquid is stirred with spoon during slagging-off, and is moved up and down, to remove the impurity such as the gas in aluminium liquid.Then
1.5wt%~2wt% pure Mg is added in aluminium alloy, to reduce SiCpThe angle of wetting of particle and aluminium liquid, reduces its surface
Power, increases wetability.
(3) mechanical agitation prepares composite and pours into aluminium liquid in melting kettle in stirring crucible, in 680 DEG C, insulation
Start stirring after more than 30min.During stirring, the upper-lower position of stirring rod is adjusted according to the material content in crucible, is often stirred several
Change stirring rod direction of rotation after minute, so that the eddy-currents that blade is produced can be such that all material is all stirred to making its uniform.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of T-piece semisolid die forging forming technology, it is characterised in that described technique need to be added using T-shaped part die forging system
Work is completed, wherein described T-shaped part die forging system includes：Semisolid dispensing Preparation equipment and forging die forming equipment, the forging die
Former includes：T-shaped part mould, pressure actuated device, the T-shaped part mould at least include it is T-shaped into component, it is described it is T-shaped into
Component includes：Punch-pin, left cavity plate, right cavity plate and left slider, right sliding block, pressure is set respectively on described left slider, right sliding block
Some hydraulic pistons；The described left slider of the pressure actuated device control, the movement of right sliding block, and by adjusting pressure-driven
The pressure size of device realizes different speed；
Described technique at least comprises the following steps：
Aluminum-base composite semi-solid blank is prepared using mechanical mixing method, including：Select matrix material 2A50 forging aluminium alloys, reinforcement
Material is SiCp particles, wherein, SiCp grains degree is 7 μm, volume fraction 7.5%；
SiCp particles are pre-processed, standby reinforcement particle is obtained；
Melting 2A50 aluminium alloys：With crucible for smelting aluminium alloy to 640 DEG C~660 DEG C, refining agent is added, refining removes the gred after 5 minutes,
Aluminum alloy melt is stirred during slagging-off, and moved up and down；
1.5wt%~2wt% pure Mg is added in aluminum alloy melt；
SiCp particles are preheated：SiCp particles are wrapped up with 10g aluminium foils, 600 DEG C are heated in the crucible for being put into heating furnace, and
It is incubated 30min to 60min；
First the SiCp particles after preheating are added in stirring crucible, aluminum alloy melt is then added, is heated, when temperature is heated to
Start stirring at more than 680 DEG C, after insulation more than 30min, during stirring, according to the upper of the material content regulation stirring rod in crucible
Lower position, stirring rod direction of rotation is changed after often stirring 3 to 10 minutes, by heating and temperature control at 680 DEG C to 700 DEG C, stirring
Rod persistently stirs 40 to 60min with 875r/min；
Composite is poured into press molding in the blank mold of preheating by stirring immediately after terminating, and blank mold preheating temperature is
300~350 DEG C, the dwell time is 0.5-1min/mm, obtains aluminum-base composite semi-solid blank；
The temperature of aluminum-base composite semi-solid blank secondary remelting is set, the secondary remelting temperature is that the temperature causes aluminum-base composite
Corresponding temperature when the fraction solid of semi-solid blank is 60% to 90%, semi-solid blank is added at a temperature of secondary remelting
Heat 50 minutes, semi-solid alloy is poured into the T-shaped part mould cavity of accommodating semi-solid blank, and alloy is filled T-shaped part axis and hung down
Straight cylinder, carries out liquid underfill at the first pressure, and punch pressure, which is less than or equal to, is pressed in left slider, the liquid on right sliding block
Press piston, drift loading velocity be 15mm/s, drift loading after the completion of pressurize 20s, aluminum-base composite semi-solid blank solidification after
Continue to load drift under second pressure, make the metal part solidified promote described left slider, right sliding block to be displaced outwardly, it is described
Left slider, right sliding block reach setting position after, stop drift loading, by be plastically deformed complete two axis horizontals it is not isometrical
The shaping of ground column part；Wherein, first pressure is less than second pressure.
2. T-piece semisolid die forging forming technology according to claim 1, it is characterised in that the T-shaped part mould includes
Lower template is fixed on the backing plate in lower template, the opposed cavity plate fixed cover on the backing plate, the left cavity plate, the right side by plug screw
Cavity plate is connected on the cavity plate fixed cover by left flange, right flange respectively, and the left slider is arranged on the left cavity plate,
The right sliding block is arranged on the right sliding block, presses the hydraulic piston being provided with respectively on described left slider, right sliding block, described
Punch-pin and left cavity plate, right female die single-side gap be 0.06 to 0.1mm；
Also include the punch retainer that cope plate is bolted on cope plate, between the punch retainer and cope plate
Provided with convex mould pad.
3. T-piece semisolid die forging forming technology according to claim 2, it is characterised in that in cavity plate and cavity plate die sleeve
Between be provided with gradient.
4. T-piece semisolid die forging forming technology according to claim 1, it is characterised in that pressure actuated device includes：
Fuel tank, hydraulic pump, overflow valve, choke valve, reversal valve and hydraulic cylinder；After startup, by the pressure of throttle valve adjustment oil pressure, with not
Oil cylinder piston movement is driven with ground speed, untill meeting the stroke after forcing press continues to press, pressure actuated device is by two
Individual oil cylinder controls left and right two sliding blocks.
5. T-piece semisolid die forging forming technology according to claim 4, it is characterised in that also including being fixedly connected with dress
Put, the fixed connection apparatus includes：Retainer ring and shift(ing) ring that parallel spacing is set, described retainer ring, shift(ing) ring with
Two guide pillar connections, the guide pillar, which is provided with screw thread, the shift(ing) ring, is arranged with guide pin bushing, is provided with and is led in described in the guide pin bushing
Guide pillar below the screw thread that screw thread coordinates on post, the guide pin bushing is provided with nut, and described shift(ing) ring is threaded by two
Guide pillar and nut support are got up, and the hydraulic cylinder of the pressure actuated device is arranged on the shift(ing) ring, and the shift(ing) ring can lead to
Threaded adjusting height is crossed, the center of hydraulic cylinder and the center of the left and right sliding block of T-shaped part mould is controlled in same level height.
6. T-piece semisolid die forging forming technology according to claim 5, it is characterised in that T-shaped part die forging system is also wrapped
Include：Hydraulic press, heating furnace, temperature controller, temperature of silicon controlled rectifier instrument；Using controllable temperature instrument and open type heating furnace as heating fusing gold
Category, the power of open type heating furnace is 10kw, and temperature sensor material is nickel chromium triangle-nickel silicon alloy, using 4 Resistant heating blanks
Mould；Install porcelain tube additional inside and outside resistance wire, and the asbestos material of parcel fire resisting reduces blank mold and environment in heating
Heat exchange；The temperature of blank mold is measured using XMT-101 temperature digital displays controller unit, the measurement range of temperature control equipment is
1-1300 degrees Celsius, error is less than or equal to 1 degree Celsius；Coil voltage 380V, it is possible to achieve overvoltage and overcurrent protection；It is described
Hydraulic press is 2000KN liquid-state die forging hydraulic press.
7. T-piece semisolid die forging forming technology according to claim 1, it is characterised in that use machine oil graphite lubrication
Agent is lubricated to the T-shaped part mould, and the graphite powder for being 5% by mass fraction is added to the machine oil that mass fraction is 95%
In, with spray gun spraying in blank mold mold cavity surface after uniform stirring, its thickness is 0.05-0.1mm.
8. T-piece semisolid die forging forming technology according to claim 1, it is characterised in that the first pressure is
22MPa、34MPa、46MPa；The T-shaped material into component is 5CrNiMo.
9. T-piece semisolid die forging forming technology according to claim 1, it is characterised in that carried out to SiCp particles pre-
Processing is specifically included：
Pickling：Pickling is carried out with 10% HF solution immersion SiCp particles 24h；
Cleaning：SiCp suspensions after pickling 24h are cleaned multiple times with a large amount of distilled water, first water are changed within every 1~2 hour,
Until solution reaches neutrality；
Drying：The clear water of SiCp liquid surfaces is removed, 24h~28h is dried under conditions of 140 DEG C~160 DEG C in drying baker；
Grinding：There is caking phenomenon in SiCp after drying, is ground with mortar, becomes powdered, sealing after grinding
Preserve；
Sintering：The SiCp handled by said process needs to sinter 2~3 hours under 800 DEG C of ± 5 DEG C of high temperature.
10. T-piece semisolid die forging forming technology according to claim 9, it is characterised in that described sintering process tool
Body is：Crucible is put into heating furnace and is preheating to 100 DEG C~150 DEG C with stove, SiCp particles are put into crucible and arrived with stove heat
300 DEG C~400 DEG C, insulation 30min or so, and be stirred continuously；It is heated to 800 DEG C to be sintered, is needed in sintering process constantly
Stirring；Cool to room temperature with the furnace.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931581A (en) * | 2017-11-22 | 2018-04-20 | 中国船舶重工集团公司第十二研究所 | The more echelon pressure regulation combined shaping methods of aluminum matrix composite |
| CN117161381A (en) * | 2023-11-02 | 2023-12-05 | 国网山东省电力公司烟台供电公司 | Near-net forming preparation method of aluminum-based composite ball head and bowl hardware fitting |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005029813A (en) * | 2003-07-07 | 2005-02-03 | Sakai Ovex Co Ltd | Carbon-fiber-reinforced aluminum-based composite material and manufacturing method therefor |
| CN101077522A (en) * | 2007-06-21 | 2007-11-28 | 北京科技大学 | Semi-solid composite connecting forming process for preparing compound structures parts |
| CN102284664A (en) * | 2011-07-05 | 2011-12-21 | 哈尔滨工业大学 | Semi-solid forming die and forming method for cavity-variable axisymmetric part |
| CN103831417A (en) * | 2014-03-11 | 2014-06-04 | 扬州宏福铝业有限公司 | Continuous semisolid forming method for high-silicon aluminum alloy encapsulation shell |
| CN106191485A (en) * | 2016-08-31 | 2016-12-07 | 中北大学 | ZL205A aluminium alloy and liquid forging forming process structure property uniformity control method thereof |
| CN106435299A (en) * | 2016-09-30 | 2017-02-22 | 华南理工大学 | SiC particle reinforced aluminium-based composite and preparation method thereof |
-
2017
- 2017-05-05 CN CN201710312525.2A patent/CN106964734A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005029813A (en) * | 2003-07-07 | 2005-02-03 | Sakai Ovex Co Ltd | Carbon-fiber-reinforced aluminum-based composite material and manufacturing method therefor |
| CN101077522A (en) * | 2007-06-21 | 2007-11-28 | 北京科技大学 | Semi-solid composite connecting forming process for preparing compound structures parts |
| CN102284664A (en) * | 2011-07-05 | 2011-12-21 | 哈尔滨工业大学 | Semi-solid forming die and forming method for cavity-variable axisymmetric part |
| CN103831417A (en) * | 2014-03-11 | 2014-06-04 | 扬州宏福铝业有限公司 | Continuous semisolid forming method for high-silicon aluminum alloy encapsulation shell |
| CN106191485A (en) * | 2016-08-31 | 2016-12-07 | 中北大学 | ZL205A aluminium alloy and liquid forging forming process structure property uniformity control method thereof |
| CN106435299A (en) * | 2016-09-30 | 2017-02-22 | 华南理工大学 | SiC particle reinforced aluminium-based composite and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| 秦晋: "铝合金T型件半固态填充-塑性流动一体化模锻研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 罗守靖: "半固态金属流变学", 《半固态金属流变学》 * |
| 贾海萌: "SiCp增强铝基复合材料履带板成形的研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107931581A (en) * | 2017-11-22 | 2018-04-20 | 中国船舶重工集团公司第十二研究所 | The more echelon pressure regulation combined shaping methods of aluminum matrix composite |
| CN107931581B (en) * | 2017-11-22 | 2019-06-21 | 中国船舶重工集团公司第十二研究所 | The more echelon pressure regulation combined shaping methods of aluminum matrix composite |
| CN117161381A (en) * | 2023-11-02 | 2023-12-05 | 国网山东省电力公司烟台供电公司 | Near-net forming preparation method of aluminum-based composite ball head and bowl hardware fitting |
| CN117161381B (en) * | 2023-11-02 | 2024-01-16 | 国网山东省电力公司烟台供电公司 | Near-net forming preparation method of aluminum-based composite ball head and bowl hardware fitting |
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