CN108326067A - Aluminium alloy extruded scraps recycle method - Google Patents
Aluminium alloy extruded scraps recycle method Download PDFInfo
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- CN108326067A CN108326067A CN201810085252.7A CN201810085252A CN108326067A CN 108326067 A CN108326067 A CN 108326067A CN 201810085252 A CN201810085252 A CN 201810085252A CN 108326067 A CN108326067 A CN 108326067A
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- aluminium alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C35/00—Removing work or waste from extruding presses; Drawing-off extruded work; Cleaning dies, ducts, containers, or mandrels
- B21C35/04—Cutting-off or removing waste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/32—Lubrication of metal being extruded or of dies, or the like, e.g. physical state of lubricant, location where lubricant is applied
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Abstract
The present invention provides a kind of aluminium alloy extruded scraps recycle methods, belong to aluminum alloy processing technology field.The aluminium alloy extruded scraps recycle method includes the following steps：The circle ingot casting being located in extrusion die is squeezed using pressure ram and extrusion cylinder；When the value that the residue length of extrusion cylinder inner circle ingot casting is more than discard length reaches the first distance d1, stop to squeeze；Pressure ram and extrusion cylinder are retreated successively, when tension failure occurs for the aluminium alloy in the tap hole of remaining round ingot casting and extrusion die in extrusion cylinder, continue pressure ram and extrusion cylinder retreating second distance d2；In the surface smear lubricant of the exposed circle ingot casting of extrusion cylinder；Continue to squeeze, stops squeezing after making pressure ram advance third distance S, and retreat pressure ram and extrusion cylinder again；The aluminium alloy remained in extrusion cylinder is discharged using pressure ram.Aluminium alloy extruded scraps recycle method provided by the invention is easy to operate, can effectively reduce residual Al alloy content in extrusion die, improves aluminium recovery.
Description
Technical field
The present invention relates to aluminum alloy processing technology fields, protect timesaving aluminium alloy in particular to a kind of section aluminium ring and squeeze
Press scraps recycle method.
Background technology
The features such as density that aluminium and aluminium alloy have by it is low, thermal conductivity is good, corrosion resistance is good and plasticity is excellent,
Extensive be extruded is processed into proximate matter and is applied to all trades and professions.In the production process of aluminium alloy, it is often necessary at high temperature
Aluminium alloy is squeezed and is cast to be produced into the proximate matter of suitable shape, after the completion of high temperature extrusion, extrusion die is especially
Aluminium alloy material material debris that still can be more remnants in hollow-section extrusion mould is difficult to be recycled utilization.
The general aluminium alloy extruded scraps recycle method in industry is at present：Extrusion die is placed on containing certain dense
It spends in the slot of NaOH solution and is heated to certain temperature, to dissolve in NaOH molten by aluminium alloy detritus progress etch by chemical reaction method
It is recycled in liquid.The characteristics of this method is：Time-consuming, for 55MN and the above type extruder, it is sometimes desirable to 1 day
The mold turnaround time, at least also to consume several hours time is handled；Working environment is poor, and recovery workshop scene exists big
The lye steam of amount can cause operating personnel's body a degree of actual bodily harm, also can cause environmental pollution, and need simultaneously
The lye to be consumed can also increase cost, and the waste water generated in production process is also difficult to handle to pollute the environment；Alum recovery
Difficulty, the aluminium alloy needs dissolved in lye are dissolved by solution to form Al (OH)3, or by add crystal seed agent be converted into
Solid aluminium oxide can also improve complex process degree and improve cost.Above various features can restrict to a certain extent
The order form delivery time progress of aluminum alloy extrusion product, and the yield of aluminium is reduced, it is degrading the working environment of staff, is improved
The cost recovery of aluminium alloy, cannot meet it is existing use needs.
Such as the patent of invention that Authorization Notice No. is CN104226719B, it discloses a kind of aluminium alloy extrusion mould cleaning sides
Method and equipment, are the cleaning methods using full-automatic alkali cleaning sandblasting, method include alkali cleaning, cleaning, separation, sandblasting, cleaning,
It flows, not only complex process, the operation such as air-dries, repair a die and is put in storage to be inconvenient, need to take a substantial amount of time and generate to be difficult to
The waste water of processing, greatly increases cost recovery.
The for another example patent of invention of application publication number CN101928948A, it discloses a kind of extruding die for aluminum shaped material alkali cleaning is residual
The recovery process of liquid is to boil mold through lye heat in alkaline bath, keeps the aluminium alloy in mold cavity molten except generation white
Recycling alkali clear liquid is added in grey raffinate by aluminum hydroxide precipitation, and reheating makes solution blackening, thinning rear flocculation sediment, crystal seed point
Solution, also complex process, inconvenient, needs to expend the time and generates waste water, cannot meet existing use demand.
Therefore, it is existing boil aluminium alloy recovery process in mold technique or extrusion die under the conditions of, develop a kind of process program
The residual volume of aluminium alloy in extrusion die is reduced, for shortening mold turnaround time, improving aluminium recovery and environmental protection has
It is significant.
Invention content
The present invention provides a kind of aluminium alloy extruded scraps recycle methods, can effectively reduce residual Al in extrusion die
Alloy content improves aluminium recovery.
The invention is realized in this way：
A kind of aluminium alloy extruded scraps recycle method, includes the following steps：
The circle ingot casting being located in extrusion die is squeezed using pressure ram and extrusion cylinder；
When the value that the residue length of extrusion cylinder inner circle ingot casting is more than discard length reaches the first distance d1, stop to squeeze；
Pressure ram and extrusion cylinder are retreated successively, when in the tap hole of remaining round ingot casting and extrusion die in extrusion cylinder
When tension failure occurs for aluminium alloy, continue pressure ram and extrusion cylinder retreating second distance d2；
The surface smear lubricant of exposed aluminium alloy in extrusion cylinder side；
Continue to squeeze, stops squeezing after making pressure ram advance third distance S, and retreat pressure ram and extruding again
Cylinder；
The aluminium alloy remained in extrusion cylinder is discharged.
Further, in embodiments of the present invention, the first distance d1 is 15~30mm.
Further, in embodiments of the present invention, second distance d2 is 300~400mm.
Further, in embodiments of the present invention, lubricant is boron nitride.
Further, in embodiments of the present invention, the temperature of circle ingot casting is controlled 5 DEG C below target temperature and target temperature
Between when squeezed.
Further, in embodiments of the present invention, target temperature is no more than the alloy solidus temperature of circle ingot casting or less 30
℃。
Further, in embodiments of the present invention, gradient-heated is used when the temperature for controlling circle ingot casting, round ingot casting is made to squeeze
When close to extrusion die side temperature be less than close to pressure ram side temperature.
Further, in embodiments of the present invention, third distance S chooses according to following formula：S=b × 4 × T × A/ (π
×D2), wherein b is 0.5~0.8；T is extrusion die upper mold thickness；A is shunting hole area；D is circle ingot diameters.
Further, in embodiments of the present invention, last root circle when the circle ingot casting in extrusion die is batch production
Ingot casting.
Further, in embodiments of the present invention, when the aluminium alloy in extrusion cylinder being discharged, the aluminium in extrusion cylinder is avoided to close
Gold is contacted with extrusion die.
The beneficial effects of the invention are as follows：Aluminium alloy extruded scraps recycle method provided by the invention includes the following steps：Make
The circle ingot casting being located in extrusion die is squeezed with pressure ram and extrusion cylinder；When the residue length of extrusion cylinder inner circle ingot casting is more than discard
When the value of length reaches the first distance d1, stop to squeeze；Pressure ram and extrusion cylinder are retreated successively, when remaining circle in extrusion cylinder
When tension failure occurs for aluminium alloy in the tap hole of ingot casting and extrusion die, continue by pressure ram and extrusion cylinder retreat second away from
From d2；In the surface smear lubricant of the exposed circle ingot casting of extrusion cylinder；Continue to squeeze, makes pressure ram advance third distance S
Stop squeezing afterwards, and retreats pressure ram and extrusion cylinder again；The aluminium alloy remained in extrusion cylinder is discharged.It is provided by the invention
Aluminium alloy extruded scraps recycle method is easy to operate efficiently can to effectively reduce residual Al alloy content in extrusion die, improve
Aluminium recovery.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Aluminium alloy extruded scraps recycle method provided in an embodiment of the present invention is specifically described below.
A kind of aluminium alloy extruded scraps recycle method is present embodiments provided, is included the following steps：
S1, the circle ingot casting being located in extrusion die is squeezed using pressure ram and extrusion cylinder；Wherein, circle ingot casting is preferably controlled
Temperature below target temperature and target temperature between 5 DEG C when squeezed；It is further preferred that target temperature is no more than alloy
30 DEG C below solidus temperature.It is preferred that gradient-heated is used in the temperature of the round ingot casting of control, close to crowded when round ingot casting being made to squeeze
The temperature of compression mould side is less than the temperature close to pressure ram side；Circle ingot casting in extrusion die is preferably when producing in batches
Last root justifies ingot casting.
S2, when the residue length of extrusion cylinder inner circle ingot casting be more than discard length value reach the first distance d1 when, stop squeeze
Pressure；First distance d1 is preferably 15~30mm.
S3, pressure ram and extrusion cylinder are retreated successively, when the tap hole of remaining round ingot casting and extrusion die in extrusion cylinder
When tension failure occurs for interior aluminium alloy, continue pressure ram and extrusion cylinder retreating second distance d2；Second distance d2 is preferably
300~400mm.
S4, in the surface smear lubricant of the exposed aluminium alloy in extrusion cylinder side；Lubricant is preferably boron nitride.
S5, continue to squeeze, stop squeezing after making pressure ram advance third distance S, and retreat pressure ram again and squeeze
Pressure cylinder；Preferably, third distance S chooses according to following formula：S=b × 4 × T × A/ (π × D2), wherein b is 0.5~0.8；
T is extrusion die upper mold thickness mm；A is shunting hole area mm2；D is circle ingot diameters mm.
S6, the aluminium alloy remained in extrusion cylinder is discharged using pressure ram；Wherein, preferably the aluminium in extrusion cylinder is closed
When gold discharge, the aluminium alloy in extrusion cylinder is avoided to be contacted with extrusion die.
Aluminium alloy extruded scraps recycle method provided in an embodiment of the present invention uses heating equipment control aluminium alloy first
Circle ingot casting temperature below the target temperature and target temperature of high temperature extrusion technological requirement between 5 DEG C, then using pressure ram and
Extrusion cylinder carries out thermoforming squeeze job to the circle ingot casting in extrusion die, when the residue length of extrusion cylinder inner circle ingot casting is big
When the value of discard length reaches the first distance d1, stop to squeeze and exit pressure ram and extrusion cylinder make extrusion cylinder inner circle ingot casting and
After tension failure occurs for the aluminium alloy in the tap hole of extrusion die, continues to retreat pressure ram and extrusion cylinder, then squeeze
Aluminum alloy surface after the exposed separation in cylinder side carries out secondary extrusion after smearing lubricant, and retreats pressure ram and extrusion cylinder again
After squeezed three times, make to stop after pressure ram advance third distance S squeezing, make to remain in the aluminium alloy in extrusion cylinder due to anti-
Multiple extrusion stretching falls off, and uses pressure ram that aluminium alloy detritus remaining in extrusion cylinder is discharged at this time.
The target temperature for wherein controlling circle ingot casting heating is no more than 30 DEG C of alloy solidus temperature or less, can reduce aluminium conjunction
Tensile strength of gold circle ingot casting during high temperature extrusion, ensure repeatedly extruding and so that round ingot casting and aluminium is closed during exiting
Golden detritus tension failure separation；
It is less than close to the temperature of extrusion die side when heating round ingot casting using gradient-heated mode, and round ingot casting being made to squeeze
Temperature close to pressure ram side, in order to further decrease the stretching bond strength between round ingot casting and aluminium alloy detritus, with
It is convenient that subsequently aluminium alloy detritus is detached；
In addition pressure ram and extrusion cylinder are exited after extrusion and in the surface smear lubricant of the exposed aluminium alloy of extrusion cylinder
After carry out secondary extrusion, can ensure that the aluminium alloy of lubricant both sides has poor bond strength, convenient in extrusion process
Detach aluminium alloy clast and aluminium section bar；
Lubricant selects extrusion cylinder not easy to pollute and may not flow into lubricant inside aluminium section bar, it is preferable to use boron nitride
Aqueous solution can avoid pollution proximate matter, and can effectively improve the separation rate of proximate matter and aluminium alloy clast, convenient subsequently by aluminium
Alloy clast is discharged from extrusion cylinder；
It will stop squeezing after pressure ram advance third distance S, and retrogressing pressure ram and extrusion cylinder discharge aluminium alloy are broken again
Bits, can maximumlly detach aluminium alloy clast with extrusion cylinder, it is ensured that separate and recover remaining aluminium alloy clast；It will squeeze
Cylinder in aluminium alloy discharge when, avoid the aluminium alloy in extrusion cylinder from being contacted with extrusion die, so as not to aluminium alloy clast be adsorbed on it is crowded
Squeeze job is influenced on compression mould and reduces the rate of recovery of aluminium alloy clast.
The feature of the method for the present invention and performance are described in further detail with reference to embodiments.
Embodiment 1
Certain compound section aluminium section bar is squeezed, alloy state 6061-T5, extrusion ratio 53.77, extrusion die is set
Meter includes 9 tap holes, and the gross area of tap hole is about 21600mm2, extrusion die upper mold thickness be 205mm, extrusion cylinder it is straight
Diameter is 550mm.Extrusion process requirement：500 DEG C~540 DEG C of the upper machine temperature of circle ingot casting, discard length are 65mm.
It is handled according to aluminium alloy extruded scraps recycle method provided by the invention, specific steps include：
S101, batch jobs squeeze the circle ingot casting being located in extrusion die using pressure ram and extrusion cylinder, last squeezing
When a piece round ingot casting, the temperature setting of mid freqency induction furnace is controlled, it is 540 DEG C to make machine temperature on round ingot casting, and will machine thereon
It squeezes.
S102, the control system monitoring interface by observing extruder stop to squeeze when residue circle extrusion ingot length is 90mm
Pressure.
S103, operating console slowly retreat pressure ram and extrusion cylinder successively, when remaining in the circle ingot casting in extrusion cylinder
When tension failure occurs with the aluminium alloy in extrusion die tap hole, continue pressure ram and extrusion cylinder retreating 400mm.
S104, boron nitride aqueous solution is dipped using specific purpose tool, and be applied to the exposed aluminium alloy in extrusion cylinder side
Surface, it is ensured that boron nitride has been spread by painting in each protruding parts.
S105, continue to operate extruder normal extrusion, stop squeezing after making pressure ram advance 13mm, and after operating console
Move back pressure ram and extrusion cylinder.Actual numerical value is substituted into formula S=b × 4 × T × A/ (π × D2) in, wherein b takes 0.7, gained S numbers
Value is about 13mm.
S106, operation pressure ram and extrusion cylinder, make to remain in the aluminium alloy in extrusion cylinder and are removed by extrusion cylinder front end, remove
Defective material afterwards is directly called in discard recycling hopper.
It can be seen from above-described embodiment that the tap hole of extrusion die is extruded along the aluminium of the direction of extrusion about 70% or so
To aluminium section bar, compared with the invented technology is not used, the aluminium weight remained in extrusion die reduces about 8.4kg, according to
Alum recovery price is 12000 yuan/ton and calculates that machine can save money about 100 yuan on single mold single.For boiling the mould time and
Speech can shorten 20% or more through rough calculation and boil the mould time that (under normal process conditions, residual aluminium weight is about in extrusion die
28.2kg, it is identical boil mold technique under the conditions of, time ratio according to weight ratio be roughly calculated result.) because in extrusion die residual aluminum amount subtract
Few, the alum recovery expense thus brought reduces and corresponding wastewater treatment expense reduces.
Embodiment 2
Certain specification pipe is squeezed, alloy state 6082-T6, extrusion ratio 45.58, Extrusion Die Design includes
The gross area of 4 tap holes, tap hole is about 9276mm2, the upper mold thickness of extrusion die is 60.5mm, extrusion cylinder it is a diameter of
185mm.Extrusion process requirement：The upper machine temperature of circle ingot casting is 490 DEG C~520 DEG C, and discard length is 20mm.
It is handled according to aluminium alloy extruded scraps recycle method provided by the invention, specific steps include：
S201, batch jobs squeeze the circle ingot casting being located in extrusion die using pressure ram and extrusion cylinder, last squeezing
When a piece round ingot casting, control mid freqency induction furnace temperature setting, it is 515 DEG C to make machine temperature on round ingot casting, and will be squeezed machine thereon
Pressure.
S202, stop to squeeze by observing Extruder Control System monitoring interface when residue circle extrusion ingot length is 38mm
Pressure.
S203, in operating console, pressure ram and extrusion cylinder are slowly retreated successively, when remaining in extrusion cylinder inner circle ingot casting
When tension failure occurs with aluminium alloy in extrusion die tap hole, continue pressure ram and extrusion cylinder retreating 350mm.
S204, boron nitride aqueous solution is being dipped using specific purpose tool, and is being applied to the exposed residual Al in extrusion cylinder side
Alloy surface, it is ensured that boron nitride has been spread by painting in each protruding parts.
S205, continuing to operate extruder normal extrusion, stopping squeezing after making pressure ram advance 11.5mm, and operation and control
Platform retreats pressure ram and extrusion cylinder.Actual numerical value is substituted into formula S=b × 4 × T × A/ (π × D2) in, wherein b takes 0.55, institute
It is about 11.5mm to obtain S numerical value.
S206, pressure ram and extrusion cylinder are being operated, is making to remain in the aluminium alloy in extrusion cylinder and is removed by extrusion cylinder front end, moved
Defective material after going out directly is called in discard recycling hopper.
It can be seen from above-described embodiment that compared with the invented technology is not used, the aluminium weight remained in a mold subtracts
It is about 0.83kg less, being 12000 yuan/ton according to alum recovery price calculates, and machine can save money about 4 yuan on single mold single.
For boiling the mould time, through rough calculation can shorten 30% or more boil the mould time it is (residual in extrusion die under normal process conditions
Aluminium weight is about 2.42kg, it is identical boil mold technique under the conditions of, time ratio according to weight ratio be roughly calculated result.) because of extrusion die
Interior residual aluminum amount is reduced, and the alum recovery expense thus brought reduces and corresponding wastewater treatment expense reduces.
In conclusion aluminium alloy extruded scraps recycle method provided by the invention is on the basis of existing production equipment
It can carry out, not increase any equipment investment, it is simple to operate, it is residual can effectively to reduce aluminium alloy in extrusion die tap hole
Surplus, improve aluminium recovery, and greatly shorten compared with prior art it is subsequent boil mould time and mold turnaround time, reduce
Production cost.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of aluminium alloy extruded scraps recycle method, which is characterized in that include the following steps：
The circle ingot casting being located in extrusion die is squeezed using pressure ram and extrusion cylinder；
When the value that the residue length of the round ingot casting in the extrusion cylinder is more than discard length reaches the first distance d1, stop to squeeze
Pressure；
The pressure ram and the extrusion cylinder are retreated successively, when remaining round ingot casting and the extrusion die in the extrusion cylinder
Tap hole in aluminium alloy when tension failure occurs, continue the pressure ram and the extrusion cylinder retreating second distance d2；
In the surface smear lubricant of the exposed aluminium alloy in extrusion cylinder side；
Continue to squeeze, stops squeezing after making the pressure ram advance third distance S, and retreat the pressure ram and institute again
State extrusion cylinder；
The aluminium alloy remained in the extrusion cylinder is discharged.
2. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the first distance d1 is 15
~30mm.
3. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the second distance d2 is
300~400mm.
4. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the lubricant is nitridation
Boron.
5. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the temperature of the control round ingot casting
It is squeezed when spending below target temperature and the target temperature between 5 DEG C.
6. aluminium alloy extruded scraps recycle method according to claim 5, which is characterized in that the target temperature is no more than
30 DEG C below the alloy solidus temperature of the round ingot casting.
7. aluminium alloy extruded scraps recycle method according to claim 5, which is characterized in that the temperature of the control round ingot casting
Gradient-heated is used when spending, temperature when the round ingot casting being made to squeeze close to the extrusion die side is less than close to the extruding
The temperature of bar side.
8. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the third distance S according to
Following formula is chosen：S=b × 4 × T × A/ (π × D2), wherein b is 0.5~0.8；T is extrusion die upper mold thickness；A is point
Orifice area；D is circle ingot diameters.
9. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that the circle in the extrusion die
Last root circle ingot casting when ingot casting is batch production.
10. aluminium alloy extruded scraps recycle method according to claim 1, which is characterized in that will be in the extrusion cylinder
When aluminium alloy is discharged, the aluminium alloy in the extrusion cylinder is avoided to be contacted with the extrusion die.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238149A (en) * | 2020-09-05 | 2021-01-19 | 江阴昭旭金属制品有限公司 | Extruder for producing solar frame and production process of solar frame |
| CN112828262A (en) * | 2020-12-31 | 2021-05-25 | 河南中恒美新材料有限公司 | Preparation device and preparation method of one-mold porous aluminum profile |
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| CN112828262A (en) * | 2020-12-31 | 2021-05-25 | 河南中恒美新材料有限公司 | Preparation device and preparation method of one-mold porous aluminum profile |
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| CN108326067B (en) | 2019-09-20 |
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Denomination of invention: Recovery method of aluminum alloy extrusion residue Effective date of registration: 20211117 Granted publication date: 20190920 Pledgee: Yantai Donghai aluminum foil Co.,Ltd. Pledgor: Shandong Nanshan Aluminium Co.,Ltd. Registration number: Y2021980012518 |
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