CN114603100A - High-pressure vacuum die casting device and method for high-strength high-toughness aluminum alloy damping tower - Google Patents
High-pressure vacuum die casting device and method for high-strength high-toughness aluminum alloy damping tower Download PDFInfo
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- CN114603100A CN114603100A CN202210144049.9A CN202210144049A CN114603100A CN 114603100 A CN114603100 A CN 114603100A CN 202210144049 A CN202210144049 A CN 202210144049A CN 114603100 A CN114603100 A CN 114603100A
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- 238000004512 die casting Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 34
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 26
- 238000013016 damping Methods 0.000 title claims abstract description 23
- 238000001125 extrusion Methods 0.000 claims abstract description 53
- 238000005266 casting Methods 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 59
- 239000007924 injection Substances 0.000 claims description 59
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000007774 longterm Effects 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B22D17/14—Machines with evacuated die cavity
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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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2227—Die seals
-
- 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
- B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
- B22D17/2236—Equipment for loosening or ejecting castings from dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a high-pressure vacuum die-casting device and a high-pressure vacuum die-casting method for a high-strength high-toughness aluminum alloy damping tower, wherein the structure of the device comprises a top plate, a top rod frame and an ejection die, the top plate, the top rod frame and the ejection die are fixedly connected, an ejection mechanism sequentially penetrates through the top plate, the top rod frame and the ejection die, and the ejection mechanism is in sliding connection with the top plate, the top rod frame and the ejection die; an extrusion cylinder is fixed on one side of the top plate, an extrusion plug is arranged in the extrusion cylinder, a movable die is arranged on one side of the ejection die, a gap is reserved between the ejection die and the movable die, and an extrusion sealing gasket is arranged between the ejection die and the movable die; one side of the movable die is fixed with a fixed die, one side of the fixed die is fixed with a fixed plate, a pressing cylinder is fixed on the fixed plate, the pressing cylinder penetrates through the fixed plate and the fixed die, a pressing plug is arranged on the pressing cylinder, and a cavity vacuum loop and a liquid inlet cavity are arranged on the side wall of the pressing cylinder. The invention can rapidly improve the mechanical property of the damping tower, make the mechanical property more uniform, and greatly improve the long-term production stability and consistency of castings.
Description
Technical Field
The invention relates to the technical field of die casting processes, in particular to a high-pressure vacuum die casting device and method for a high-strength high-toughness aluminum alloy damping tower.
Background
With the advance of the lightweight process of fuel vehicles and new energy vehicles, the lightweight of structural members of the fuel vehicles and the new energy vehicles has a certain trend of replacing steel with aluminum, and the vacuum high-pressure die-casting process technology is very critical to the development of high-strength and high-toughness die-casting aluminum alloy. At present, domestic die-casting enterprises have corresponding vacuum high-pressure die-casting process technologies, but the mechanical property of the die-casting enterprises still needs to be improved, certain defects exist in the aspects of large-batch stable production and application, and the problems of poor mechanical property of castings, poor production stability of the castings and poor consistency of the castings are easily caused due to the influence of long-time operation, aging and other factors of equipment.
Disclosure of Invention
Aiming at the problems, the invention provides a high-pressure vacuum die-casting device and a high-pressure vacuum die-casting method for a high-strength high-toughness aluminum alloy damping tower, which can be used for rapidly improving the mechanical property of the damping tower, enabling the mechanical property of the damping tower to be more uniform and greatly improving the long-term production stability and consistency of castings.
According to one object of the invention, the invention provides a high-pressure vacuum die-casting device for a high-strength high-toughness aluminum alloy damping tower, which comprises a top plate, a top rod frame and an ejection die, wherein the top plate, the top rod frame and the ejection die are fixedly connected;
a squeezing cylinder is fixed on one side of the top plate, a squeezing plug is arranged in the squeezing cylinder, a movable die is arranged on one side of the ejecting die, a gap is reserved between the ejecting die and the movable die, and a squeezing sealing gasket is arranged between the ejecting die and the movable die; the injection device is characterized in that a fixed die is fixed on one side of the movable die, a fixed plate is fixed on one side of the fixed die, an injection cylinder is fixed on the fixed plate and penetrates through the fixed plate and the fixed die, an injection plug is arranged on the injection cylinder, and a cavity vacuum circuit and a liquid inlet cavity are arranged on the side wall of the injection cylinder.
Furthermore, the extrusion cylinder is fixedly arranged, and the extrusion cylinder is in sliding connection with the top plate.
Further, a sealing ring is arranged between the extrusion cylinder and the top plate.
Further, the ejection mechanism includes a plurality of ejection rods at an end located adjacent to the ejection die.
According to another object of the invention, the invention provides a high-pressure vacuum die-casting method of a high-strength high-toughness aluminum alloy damping tower, which comprises the following steps:
s1, vacuumizing, enabling aluminum alloy liquid with a certain volume to flow into the injection cylinder through the liquid inlet cavity, quickly pressing the aluminum alloy liquid into the cavity of the injection cylinder by the injection plug at an injection speed, keeping the injection force of the injection plug, and keeping the extrusion force of the extrusion plug at the same time, so that the aluminum alloy liquid in the cavity of the injection cylinder is quickly stressed and balanced between the ejection die and the movable die;
s2, respectively changing the injection force of the injection plug and the extrusion force of the extrusion plug within 2S according to the alternating frequency w, and acting on the injection plug and the extrusion plug;
at the end of S3, 2S, the shot plug maintains a constant shot force while the extrusion plug maintains a constant extrusion force;
s4, after the casting with the casting is solidified and cooled, separating the movable mold from the ejection mold, and horizontally separating the casting from the ejection mold by the ejection mechanism;
s5, shooting the surface of the casting by using a camera, and comparing the surface of the casting with a standard casting surface picture to obtain a surface deviation rate under the current die-casting process; and comparing the thickness with the target thickness of the casting, and acquiring the maximum thickness error of the casting by using the automatic thickness detection device.
Further, if the surface deviation rate is larger than the specified target deviation rate, the next die-casting process adjusts the sizes of the injection force peak value and the extrusion force peak value so as to obtain the optimal surface quality of the casting, otherwise, the injection force peak value and the extrusion force peak value in the next die-casting process are consistent with the previous die-casting process.
Further, if the maximum thickness error is larger than the specified target thickness error, the next die-casting process adjusts the magnitude of the injection force and extrusion force alternating frequency w to obtain a casting with uniform thickness, otherwise, the injection force and extrusion force alternating frequency in the next die-casting process is consistent with that in the previous die-casting process.
The invention has the beneficial effects that: according to the invention, a certain gap is reserved between the ejection die and the movable die, the extrusion gasket is arranged, the alternating change of extrusion force and injection force is matched, and the offline surface and thickness detection is combined, so that the mechanical property of the damping tower can be rapidly improved, the mechanical property is more uniform, and the long-term production stability and consistency of castings are greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a system control diagram of an embodiment of the present invention.
In the figure, 1-top plate, 2-top rod frame, 3-top mold, 4-top mechanism, 5-extrusion cylinder, 6-extrusion plug, 7-movable mold, 8-extrusion sealing gasket, 9-fixed mold, 10-fixed plate, 11-injection cylinder, 12-injection plug, 13-cavity vacuum circuit, 14-liquid inlet cavity, 15-camera, 16-damping tower, 17-thickness automatic detection device and 18-high pressure vacuum die casting machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the high-pressure vacuum die-casting device for the high-strength high-toughness aluminum alloy damping tower comprises a top plate 1, a top rod frame 2 and an ejection die 3, wherein the top plate 1, the top rod frame 2 and the ejection die 3 are welded with each other, an ejection mechanism sequentially penetrates through the top plate 1, the top rod frame 2 and the ejection die 3, and one end, close to the ejection die 3, of the ejection mechanism 4 comprises a plurality of ejection rods. The ejection mechanism 4 is in clearance fit connection with the top plate 1, the ejector rod frame 2 and the ejection die 3, and can independently perform horizontal movement.
An extrusion cylinder 5 is fixed on one side of the top plate 1, an extrusion plug 6 is arranged in the extrusion cylinder 5, the extrusion cylinder 5 is fixed and does not move, the extrusion cylinder 5 and the top plate 1 slide, the extrusion cylinder 5 and the top plate 1 are connected through a sealing ring (not shown in the figure), and the connecting top plate 1 can move back and forth in the horizontal direction.
One side of the ejection die 3 is provided with a movable die 7, a certain gap is reserved between the ejection die 3 and the movable die 7, and an extrusion sealing gasket 8 is arranged between the ejection die 3 and the movable die 7. One side of the movable die 7 is fixed with a fixed die 9, one side of the fixed die 9 is fixed with a fixed plate 10, a injection cylinder 11 is fixed on the fixed plate 10, the injection cylinder 11 penetrates through the fixed plate 10 and the fixed die 9, an injection plug 12 is arranged on the injection cylinder 11, and a cavity vacuum circuit 13 and a liquid inlet cavity 14 are arranged on the side wall of the injection cylinder 11.
The die-casting method of the high-pressure vacuum die-casting device for the high-strength high-toughness aluminum alloy damping tower comprises the following steps:
as shown in fig. 2, vacuum is applied, a certain volume of the aluminum alloy liquid flows into the injection cylinder 11 through the liquid inlet chamber 14, the injection plug 12 rapidly presses the aluminum alloy liquid into the cavity of the injection cylinder 11 at an injection speed V, and the injection plug 12 maintains a certain injection force F at a certain position1While the squeeze plug 6 maintains the squeezing force F2So that the aluminum alloy liquid in the cavity of the injection cylinder 11 is quickly stressed and balanced between the ejection die 3 and the movable die 7.
The injection force and the extrusion force are respectively changed within 2s according to a certain alternating frequency w, namely F3And F4Acting on the shot plug 12 and the squeeze plug 6.
Wherein, F3＝F1|cos(wt)|，F4＝F2|sin(wt)|。
After 2s, the shot plug 12 maintains a constant shot force F at a certain position1While maintaining a constant pressing force F on the plug 62。
After the casting with the casting is solidified and cooled, the movable mold 7 is separated from the ejection mold 3, and the ejection mechanism 4 horizontally separates the casting from the ejection mold 3.
Shooting the surface of a casting (a damping tower 16) by using a camera 15, and obtaining the surface deviation rate under the current die-casting process by comparing with a standard casting surface picture; the maximum thickness error of the casting is obtained by the thickness automatic detection device 17 through comparison with the target thickness of the casting.
If surfaceThe deviation rate is larger than the specified target deviation rate, and the next die-casting process adjusts the peak value F of the injection force1And peak pressing force F2To obtain the best casting surface quality, otherwise the peak value F of the injection force at the next die-casting1And peak pressing force F2The method is consistent with the previous die-casting process.
If the maximum thickness error is larger than the specified target thickness error, the next die-casting process adjusts the magnitude of the injection force extrusion force alternating frequency w to obtain a casting with uniform thickness, otherwise, the injection force extrusion force alternating frequency w when the next die-casting is carried out by the high-pressure vacuum die-casting machine 18 is consistent with the previous die-casting process.
According to the invention, a certain gap is reserved between the ejection die and the movable die, the extrusion gasket is arranged, the alternating change of extrusion force and injection force is matched, and the offline surface and thickness detection is combined, so that the mechanical property of the damping tower can be rapidly improved, the mechanical property is more uniform, and the long-term production stability and consistency of castings are greatly improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The high-pressure vacuum die-casting device for the high-strength high-toughness aluminum alloy damping tower is characterized by comprising a top plate, a top rod frame and an ejection die, wherein the top plate, the top rod frame and the ejection die are fixedly connected, an ejection mechanism sequentially penetrates through the top plate, the top rod frame and the ejection die, and the ejection mechanism is in sliding connection with the top plate, the top rod frame and the ejection die;
an extrusion cylinder is fixed on one side of the top plate, an extrusion plug is arranged in the extrusion cylinder, a movable die is arranged on one side of the ejection die, a gap is reserved between the ejection die and the movable die, and an extrusion sealing gasket is arranged between the ejection die and the movable die; the injection device is characterized in that a fixed die is fixed on one side of the movable die, a fixed plate is fixed on one side of the fixed die, an injection cylinder is fixed on the fixed plate and penetrates through the fixed plate and the fixed die, an injection plug is arranged on the injection cylinder, and a cavity vacuum circuit and a liquid inlet cavity are arranged on the side wall of the injection cylinder.
2. The high-pressure vacuum die-casting device for the high-strength high-toughness aluminum alloy damping tower according to claim 1, wherein the extrusion cylinder is fixedly arranged, and the extrusion cylinder is in sliding connection with the top plate.
3. The high-pressure vacuum die-casting device for the high-strength high-toughness aluminum alloy damping tower as claimed in claim 1, wherein a sealing ring is arranged between the extrusion cylinder and the top plate.
4. The high-pressure vacuum casting device for the high-strength high-toughness aluminum alloy damping tower as claimed in claim 1, wherein the ejection mechanism at one end near the ejection die comprises a plurality of ejection rods.
5. The high-pressure vacuum die-casting method for the high-strength high-toughness aluminum alloy damping tower is characterized by comprising the following steps of:
s1, vacuumizing, enabling aluminum alloy liquid with a certain volume to flow into the injection cylinder through the liquid inlet cavity, quickly pressing the aluminum alloy liquid into the cavity of the injection cylinder by the injection plug at an injection speed, keeping the injection force of the injection plug, and keeping the extrusion force of the extrusion plug at the same time, so that the aluminum alloy liquid in the cavity of the injection cylinder is quickly stressed and balanced between the ejection die and the movable die;
s2, respectively changing the injection force of the injection plug and the extrusion force of the extrusion plug within 2S according to the alternating frequency w, and acting on the injection plug and the extrusion plug;
at the end of S3, 2S, the shot plug maintains a constant shot force while the extrusion plug maintains a constant extrusion force;
s4, after the casting with the casting is solidified and cooled, separating the movable mold from the ejection mold, and horizontally separating the casting from the ejection mold by the ejection mechanism;
s5, shooting the surface of the casting by using a camera, and comparing the surface of the casting with a standard casting surface picture to obtain a surface deviation rate under the current die-casting process; and comparing the thickness with the target thickness of the casting, and acquiring the maximum thickness error of the casting by using the automatic thickness detection device.
6. The high-pressure vacuum die-casting method for the high-strength high-toughness aluminum alloy damping tower as claimed in claim 5, wherein if the surface deviation rate is greater than the specified target deviation rate, the next die-casting process adjusts the magnitude of the peak injection force and the peak extrusion force to obtain the best casting surface quality, otherwise, the peak injection force and the peak extrusion force during the next die-casting process are consistent with the previous die-casting process.
7. The high-pressure vacuum die-casting method for the high-strength high-toughness aluminum alloy damping tower according to claim 5, wherein if the maximum thickness error is larger than the specified target thickness error, the next die-casting process adjusts the magnitude of the alternating frequency w of the injection extrusion force to obtain a casting with uniform thickness, otherwise, the alternating frequency of the injection extrusion force in the next die-casting process is consistent with that in the previous die-casting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210144049.9A CN114603100B (en) | 2022-02-17 | 2022-02-17 | High-pressure vacuum die-casting method for high-strength high-toughness aluminum alloy damping tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210144049.9A CN114603100B (en) | 2022-02-17 | 2022-02-17 | High-pressure vacuum die-casting method for high-strength high-toughness aluminum alloy damping tower |
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| CN114603100A true CN114603100A (en) | 2022-06-10 |
| CN114603100B CN114603100B (en) | 2022-11-08 |
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Citations (7)
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|---|---|---|---|---|
| DE19605727A1 (en) * | 1996-02-16 | 1997-08-21 | Mueller Weingarten Maschf | Vacuum die casting machine |
| CN102069171A (en) * | 2011-01-29 | 2011-05-25 | 马保庆 | Squeeze casting machine and squeeze casting method thereof |
| CN103567413A (en) * | 2013-09-30 | 2014-02-12 | 胜赛思精密压铸（扬州）有限公司 | Die-casting device for solving air hole defect of die-casting product and die-casting process thereof |
| KR20150037322A (en) * | 2013-09-30 | 2015-04-08 | 동남정밀 주식회사 | Forming vacuum method for die-casting die |
| CN106552917A (en) * | 2016-11-30 | 2017-04-05 | 中国科学院金属研究所 | A kind of high vacuum die casting mould for alloy die cast shaping |
| CN113333713A (en) * | 2021-07-06 | 2021-09-03 | 重庆理工大学 | Vacuum die-casting die for manufacturing shock absorption tower and vacuum die-casting method of shock absorption tower |
| CN113523223A (en) * | 2021-07-16 | 2021-10-22 | 上海交通大学 | Vacuum die-casting forming method and device for aluminum/magnesium alloy |
-
2022
- 2022-02-17 CN CN202210144049.9A patent/CN114603100B/en active Active
Patent Citations (7)
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|---|---|---|---|---|
| DE19605727A1 (en) * | 1996-02-16 | 1997-08-21 | Mueller Weingarten Maschf | Vacuum die casting machine |
| CN102069171A (en) * | 2011-01-29 | 2011-05-25 | 马保庆 | Squeeze casting machine and squeeze casting method thereof |
| CN103567413A (en) * | 2013-09-30 | 2014-02-12 | 胜赛思精密压铸（扬州）有限公司 | Die-casting device for solving air hole defect of die-casting product and die-casting process thereof |
| KR20150037322A (en) * | 2013-09-30 | 2015-04-08 | 동남정밀 주식회사 | Forming vacuum method for die-casting die |
| CN106552917A (en) * | 2016-11-30 | 2017-04-05 | 中国科学院金属研究所 | A kind of high vacuum die casting mould for alloy die cast shaping |
| CN113333713A (en) * | 2021-07-06 | 2021-09-03 | 重庆理工大学 | Vacuum die-casting die for manufacturing shock absorption tower and vacuum die-casting method of shock absorption tower |
| CN113523223A (en) * | 2021-07-16 | 2021-10-22 | 上海交通大学 | Vacuum die-casting forming method and device for aluminum/magnesium alloy |
Non-Patent Citations (1)
| Title |
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Inventor after: Su Zhanwei Inventor after: Xu Shiwei Inventor after: Xiao Peijie Inventor after: Jin Chen Inventor after: Lin Zhanhong Inventor before: Su Zhanwei Inventor before: Xu Shiwei Inventor before: Xiao Peijie |
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Effective date of registration: 20231115 Address after: 410082 No. 1, lushanmen, Lushan South Road, Yuelu District, Changsha City, Hunan Province Patentee after: HUNAN University Patentee after: Suzhou Research Institute of Hunan University Address before: 410082 No. 1, lushanmen, Lushan South Road, Yuelu District, Changsha City, Hunan Province Patentee before: HUNAN University |