CN107414052B - Die casting machining system - Google Patents
Die casting machining system Download PDFInfo
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- CN107414052B CN107414052B CN201710498348.1A CN201710498348A CN107414052B CN 107414052 B CN107414052 B CN 107414052B CN 201710498348 A CN201710498348 A CN 201710498348A CN 107414052 B CN107414052 B CN 107414052B
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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
- B22D17/2015—Means for forcing the molten metal into the die
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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
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2069—Exerting after-pressure on the moulding material
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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
- B22D17/32—Controlling equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a die casting processing system and a processing method, which mainly solve the technical problem of incomplete bubble elimination in the prior art, the die casting processing system comprises a die casting cavity and a microprocessor, an injection punch head which is in conduction connection with the die casting cavity through a first switch valve, a second switch valve, a vacuumizing device of a third switch valve, a vacuumizing pipe and a solution storage device, wherein a power pump is arranged at the connection part of the vacuumizing pipe and the solution storage device; a vacuum sensor is arranged in the die casting cavity to feed back the vacuum degree in the die casting cavity to the microprocessor, a liquid level sensor is arranged to feed back the liquid level in the die cavity to the microprocessor, and the solution is aluminum magnesium alloy solution; the technical scheme that the microprocessor controls the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve better solves the problem and can be used for die casting machining.
Description
Technical Field
The invention relates to the field of automobile die casting machining, in particular to a machining method of a die casting machining system.
Background
Although die casting has the advantages of high surface quality, high dimensional accuracy and high production efficiency of die castings, the die castings are easy to generate air holes, so that the mechanical properties of the castings are reduced. The pores are formed by gas remaining in the die casting. There are two measures to prevent the formation of air holes: on the one hand, the air content in the die casting process is monitored and on the other hand, air remaining in the die casting is removed, but in order to prevent damage to the function of the die casting. In order to reduce the internal air holes of the die casting and improve the mechanical property of the die casting.
The existing methods for reducing the internal air holes of the die casting and improving the mechanical property of the die casting include ultra-low speed die casting, chlorine filling die casting and vacuum pressing. Among them, vacuum die casting is a commonly used production method. The vacuum die casting method cannot completely eliminate air bubbles in the die cast. Therefore, it is necessary to provide a die casting system and a processing method having a good bubble elimination effect.
Disclosure of Invention
The invention aims to solve the technical problem of incomplete bubble elimination in the prior art. The die casting processing system and the die casting processing method have the advantages of being good in bubble eliminating effect, convenient to use and high in efficiency.
In order to solve the technical problems, the technical scheme is as follows:
a die casting processing system comprises a die casting cavity and a microprocessor, wherein an injection punch head is in conduction connection with the die casting cavity through a first switch valve, a pipe is drawn through a second switch valve, the pipe is in conduction connection with a solution storage device through a vacuum-pumping device of a third switch valve, and a power pump is arranged at the connection position of the pipe and the solution storage device; a vacuum sensor is arranged in the die casting cavity to feed back the vacuum degree in the die casting cavity to the microprocessor, a liquid level sensor is arranged to feed back the liquid level in the die cavity to the microprocessor, and the solution is aluminum magnesium alloy solution; and the microprocessor controls the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve.
The working principle of the invention is as follows: the content of bubbles can be reduced by the technical scheme that the solution is sprayed into the die casting cavity after vacuumizing is finished. The invention can improve the efficiency, effect and standardization of die-casting processing by carrying out real-time detection and tracking control on the die-casting using environment through the microprocessor, the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve and by arranging the vacuum sensor, the liquid level sensor and the temperature sensor.
In the above technical solution, for optimization, further, the vacuum sensor includes a temperature sensing module and a control module, the temperature sensing module includes a metal shell, a vacuum cavity is provided in the metal shell, a temperature sensing device and a control conversion circuit connected to the temperature sensing device are provided in the vacuum cavity, and the control conversion circuit includes a signal amplification circuit and an AD conversion circuit; the temperature sensing device comprises a sensing element unit, the sensing element unit is of a spiral filament structure, the spiral filament structure comprises four layers of spiral bodies, the first layer of spiral body is a spiral body formed by spirally winding an auxiliary tungsten wire around a first main tungsten wire, the second layer of spiral body is a spiral body formed by spirally winding a first layer of spiral body around a second main tungsten wire, the third layer of spiral body is a spiral body formed by spirally winding the second layer of spiral body, and the fourth layer of spiral body is a spiral body formed by spirally winding the third layer of spiral body; the tungsten wire is a spiral twisted-pair tungsten wire combination.
Furthermore, the quantity of the liquid level sensors is 2, and the liquid level sensors are respectively arranged at the top and the bottom of the die casting cavity.
Further, the die casting processing system is also provided with a temperature adjusting device.
Further, the pressure chamber is connected with the die casting cavity through a pressure chamber, and the pressure chamber is sealed with the suction pipe.
The invention also provides a processing method based on the die casting processing system, which comprises the following steps:
(1) adding the die into a die, and heating a die cavity of the die casting to 600-800 ℃ by using a temperature adjusting device;
(2) the microprocessor controls the vacuum pumping device to pump vacuum, and simultaneously adjusts the vacuum pumping speed according to the feedback result of the vacuum sensor;
(3) filling the solution into a pressure chamber through a power pump, and after the pressure chamber is filled with the solution, injecting the solution in the pressure chamber into a cavity by the operation of an injection punch head;
(4) slowly reducing the temperature by using a temperature adjusting device, cooling the cavity, solidifying the solution, and simultaneously applying pressure to the die casting for forming;
(5) and taking out the formed die casting.
Further, in the step (1), the die casting cavity is heated to 600 ℃ by using a temperature adjusting device.
Further, the machining method further comprises the step of carrying out post-treatment on the formed die casting, wherein the post-treatment comprises deburring.
The air pressure can be converted according to the change of voltage, and the vacuum degree is measured. The invention utilizes the spiral filament mechanism to increase the contact area of the filament. The temperature sensing element is combined and arranged by adopting a Wheatstone bridge structure, the Wheatstone bridge structure is a bridge circuit consisting of four resistors, the four resistors are respectively called as bridge arms of a bridge, the Wheatstone bridge measures the change of the physical quantity by using the change of the resistors, the corresponding change of the physical quantity can be calculated by collecting and processing the voltages at the two ends of the variable resistor, and the heat conduction calculation and measurement principle is optimized by a high-precision measurement mode. Aiming at the inevitable environmental temperature influence in the using process of a product, the temperature is acquired in real time by adopting a temperature sensor, compensation calculation is carried out by utilizing an accurate temperature compensation technology, and the temperature is displayed in real time. The invention can respectively control the measurement error at 30% of the atmosphere end and about 10% of the vacuum section in 10-3 to 10-4 millibar, thus greatly improving the measurement accuracy of the vacuum sensor. Meanwhile, due to the special spiral structure of the filament, the stability and the anti-vibration performance of the filament are greatly improved. The shock resistance is greatly superior to that of the common drawn filament. Is very suitable for being installed and used on transportation tools such as tank cars and the like.
Particularly, the filament structure with the double-main-auxiliary-filament spiral structure is used as a temperature sensing sensitive element to measure the temperature, so that the contact area between the sensitive element and a temperature sensing environment is greatly increased, the temperature change can be reflected more accurately, and the measurement resolution is improved. The filament temperature of the Pirani technology is 80-120 ℃, the influence of vacuum pump oil pollution is smaller, the Pirani technology is less prone to fracture, the Pirani technology is not prone to being influenced by mechanical stress, and the reaction time of the sensor to pressure change is prolonged due to the fact that the heat capacity of the sensor is changed due to temperature. The pirani technique has a stable filament temperature and reacts quickly to pressure changes.
The liquid level sensors are respectively arranged at the top and the bottom, so that the state in the cavity can be accurately sensed.
The invention has the beneficial effects that:
the method has the advantages that firstly, the bubble content is reduced through spray forming in vacuum;
the automatic control is carried out through the microprocessor, the environmental parameters are controlled and sensed in real time, and the processing efficiency can be improved;
effect three, cost can be reduced by increasing efficiency.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of a die casting machining system.
FIG. 2 is a flow chart of the processing method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a die casting processing system, which comprises a die casting cavity and a microprocessor, wherein an injection punch head which is in conduction connection with the die casting cavity through a first switch valve, a second switch valve, a vacuumizing device of a third switch valve, a solution storage device and a power pump are arranged at the connection position of the vacuumizing tube and the solution storage device; a vacuum sensor is arranged in the die casting cavity to feed back the vacuum degree in the die casting cavity to the microprocessor, a liquid level sensor is arranged to feed back the liquid level in the die cavity to the microprocessor, and the solution is aluminum magnesium alloy solution; and the microprocessor controls the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve.
The working principle of the invention is as follows: the content of bubbles can be reduced by the technical scheme that the solution is sprayed into the die casting cavity after vacuumizing is finished. The invention can improve the efficiency, effect and standardization of die-casting processing by carrying out real-time detection and tracking control on the die-casting using environment through the microprocessor, the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve and by arranging the vacuum sensor, the liquid level sensor and the temperature sensor.
In the above technical solution, for optimization, further, the vacuum sensor includes a temperature sensing module and a control module, the temperature sensing module includes a metal shell, a vacuum cavity is provided in the metal shell, a temperature sensing device and a control conversion circuit connected to the temperature sensing device are provided in the vacuum cavity, and the control conversion circuit includes a signal amplification circuit and an AD conversion circuit; the temperature sensing device comprises a sensing element unit, the sensing element unit is of a spiral filament structure, the spiral filament structure comprises four layers of spiral bodies, the first layer of spiral body is a spiral body formed by spirally winding an auxiliary tungsten wire around a first main tungsten wire, the second layer of spiral body is a spiral body formed by spirally winding a first layer of spiral body around a second main tungsten wire, the third layer of spiral body is a spiral body formed by spirally winding the second layer of spiral body, and the fourth layer of spiral body is a spiral body formed by spirally winding the third layer of spiral body; the tungsten wire is a spiral twisted-pair tungsten wire combination.
Preferably, the number of the liquid level sensors is 2, and the liquid level sensors are respectively arranged at the top and the bottom of the die casting cavity. The die casting forming conditions can be sensed in real time through the two liquid level sensors which are respectively arranged.
In order to increase the efficiency, the die casting processing system is preferably further provided with a temperature adjusting device. The process time for preheating and cooling by the temperature adjusting means can be reduced.
Preferably, the extraction pipe is connected with the die casting cavity through a pressure chamber, and the pressure chamber is sealed with the extraction pipe. The sealing connection can reduce the defects that pressure is insufficient due to air leakage and the material pumping time is too long, aluminum liquid can be cooled and solidified quickly, the pipe pumping opening is blocked, and the material pumping time is controlled to be optimal within 1-2 s. In this embodiment, the mould die joint all around will be sealed with joint strip, realizes the absolute sealed of mould compound die back, prevents that the external air suction from influencing the foundry goods quality in mould cavity
As shown in fig. 2, the machining method based on the die casting machining system in the present embodiment includes:
(1) adding the die into a die, and heating a die cavity of the die casting to 600-800 ℃ by using a temperature adjusting device;
(2) the microprocessor controls the vacuum pumping device to pump vacuum, and simultaneously adjusts the vacuum pumping speed according to the feedback result of the vacuum sensor;
(3) filling the solution into a pressure chamber through a power pump, and after the pressure chamber is filled with the solution, injecting the solution in the pressure chamber into a cavity by the operation of an injection punch head;
(4) slowly reducing the temperature by using a temperature adjusting device, cooling the cavity, solidifying the solution, and simultaneously applying pressure to the die casting for forming;
(5) and taking out the formed die casting.
And (3) opening the pumping pipe after the mold is preheated, wherein the temperature of the pumping pipe needs to be preheated to be more than 600 ℃, and the molten aluminum is solidified due to the fact that the temperature of the pumping pipe opening is too low at the moment when the molten aluminum is pumped into the pressure chamber, so that the pumping pipe opening is blocked.
Preferably, the die casting cavity is heated to 700 ℃ in the step (1) by using a temperature adjusting device. Heating to 700 c can minimize clogging of the extraction tube and is most effective.
Preferably, the machining method further comprises post-processing the formed die cast part, the post-processing including deburring. Through the aftertreatment, the quality of the die casting finished product can be improved.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (4)
1. A die casting system of processing which characterized in that: the die casting processing system comprises a die casting cavity and a microprocessor, an injection punch head which is in conduction connection with the die casting cavity through a first switch valve, a pumping pipe which is connected through a second switch valve, and a vacuumizing device which is connected through a third switch valve, wherein the pumping pipe is in conduction connection with a solution storage device, and a power pump is arranged at the connection position of the pumping pipe and the solution storage device; a vacuum sensor is arranged in the die casting cavity to feed back the vacuum degree in the die casting cavity to the microprocessor, a liquid level sensor is arranged to feed back the liquid level in the die cavity to the microprocessor, and the solution is aluminum magnesium alloy solution; the microprocessor controls the vacuumizing device, the injection punch, the first switch valve, the second switch valve and the third switch valve;
the vacuum sensor comprises a temperature sensing module and a control module, wherein the temperature sensing module comprises a metal shell, a vacuum cavity is arranged in the metal shell, a temperature sensing device and a control conversion circuit connected with the temperature sensing device are arranged in the vacuum cavity, and the control conversion circuit comprises a signal amplification circuit and an AD (analog-to-digital) conversion circuit; the temperature sensing device comprises a sensing element unit, the sensing element unit is of a spiral filament structure, the spiral filament structure comprises four layers of spiral bodies, the first layer of spiral body is a spiral body formed by spirally winding an auxiliary tungsten wire around a first main tungsten wire, the second layer of spiral body is a spiral body formed by spirally winding a first layer of spiral body around a second main tungsten wire, the third layer of spiral body is a spiral body formed by spirally winding the second layer of spiral body, and the fourth layer of spiral body is a spiral body formed by spirally winding the third layer of spiral body; the tungsten wire is a spiral twisted-pair tungsten wire combination.
2. The die casting machining system of claim 1, wherein: the quantity of the liquid level sensors is 2, and the liquid level sensors are respectively arranged at the top and the bottom of the die casting cavity.
3. The die casting machining system of claim 1, wherein: the die casting machining system is further provided with a temperature adjusting device.
4. The die casting machining system of claim 1, wherein: the pressure chamber is connected with the die casting cavity through the pressure chamber, and the pressure chamber is sealed with the pumping pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710498348.1A CN107414052B (en) | 2017-06-27 | 2017-06-27 | Die casting machining system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710498348.1A CN107414052B (en) | 2017-06-27 | 2017-06-27 | Die casting machining system |
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| CN107414052A CN107414052A (en) | 2017-12-01 |
| CN107414052B true CN107414052B (en) | 2020-04-07 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3490188B2 (en) * | 1995-06-08 | 2004-01-26 | 東芝機械株式会社 | Vacuum control method and apparatus in vacuum die casting |
| CN200997392Y (en) * | 2006-12-28 | 2007-12-26 | 启东市大阳照明器材有限公司 | Double master and auxiliary tungsten-filament four-spiral filament |
| JP4966911B2 (en) * | 2008-04-21 | 2012-07-04 | 本田技研工業株式会社 | Vacuum casting equipment |
| CN102145381B (en) * | 2010-02-09 | 2012-06-20 | 广东鸿泰科技股份有限公司 | Vacuum apparatus used for high vacuum die casting |
| JP2013128947A (en) * | 2011-12-21 | 2013-07-04 | Toshiba Mach Co Ltd | Die casting machine with casting die, die casting machine and casting die unit |
| JP5935776B2 (en) * | 2013-09-03 | 2016-06-15 | トヨタ自動車株式会社 | Die casting method and die casting apparatus |
| CN104841906A (en) * | 2015-06-05 | 2015-08-19 | 芜湖舜富压铸制造有限公司 | Vacuum die casting system and vacuumizing method thereof |
| CN105414515B (en) * | 2015-11-26 | 2017-12-15 | 广东鸿图科技股份有限公司 | A kind of die casting mechanism of horizontal cold room vacuum die casting machine and the method using its progress die casting |
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Effective date of registration: 20200309 Address after: No. 108, wanjianlu, Wanxiang Town, Pudong New Area, Shanghai 200000 Applicant after: Shanghai Lei Xiang Die Casting Co., Ltd. Address before: 214000 Standard Factory Building Area A of Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant before: Wuxi he Auto Parts Co., Ltd. |
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Effective date of registration: 20200312 Address after: 200 000 No. 108 Wanjian Road, Wanxiang Town, Pudong New Area, Shanghai Applicant after: Shanghai Lei Xiang Die Casting Co., Ltd. Address before: 214000 Standard Factory Building Area A of Huishan Economic Development Zone, Wuxi City, Jiangsu Province Applicant before: Wuxi he Auto Parts Co., Ltd. |
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