CN115070017B - Dual-cycle non-delay cooling system of antigravity casting equipment - Google Patents
Dual-cycle non-delay cooling system of antigravity casting equipment Download PDFInfo
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- CN115070017B CN115070017B CN202210880821.3A CN202210880821A CN115070017B CN 115070017 B CN115070017 B CN 115070017B CN 202210880821 A CN202210880821 A CN 202210880821A CN 115070017 B CN115070017 B CN 115070017B
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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
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
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Abstract
The invention discloses a dual-cycle non-delay cooling system of antigravity casting equipment, which comprises: the external circulation unit water tank is sequentially connected with a front-end filter, a water delivery pressure pump, a plate heat exchanger, a fine filter, a multi-equipment common interface and a multi-path cooling branch pipeline; each cooling branch pipeline is connected with a water path one-way valve, the front end of the water path one-way valve is connected with a mold cooling water inlet, the water path one-way valve is opened when the cooling water pressure on the cooling branch pipeline is greater than a first pressure value, the gas path one-way valve is connected with a compressed air path, a gas path electromagnetic valve is arranged on the compressed air path, and the gas path one-way valve is opened when the compressed air pressure on the compressed air path is greater than a second pressure value; the external circulation unit comprises a cooling water pipeline used for heat exchange and cooling on the plate heat exchanger, the system reduces pressure loss caused by overlong pipeline, eliminates cooling delay, recycles, realizes energy conservation, can be used by multiple devices, and meets the casting production beat.
Description
Technical Field
The invention belongs to the technical field of metal casting equipment, and particularly relates to a dual-cycle non-delay cooling system of anti-gravity casting equipment.
Background
The light weight is one of the most important ways for saving energy and reducing emission of fuel automobiles and reducing consumption and increasing range of new energy automobiles, and light weight materials such as aluminum alloy and the like are used for replacing traditional steel materials, so that the light weight materials become necessary choices for the updating of automobile design. Aluminum alloys used in automobiles can be classified into cast aluminum alloys and wrought aluminum alloys, and cast aluminum alloys dominate the production of parts such as chassis parts such as engines, clutch housings, wheels, steering knuckles, sub-frames, and the like. With the demand for improving the quality of aluminum alloy castings and the development of casting technologies, more parts are produced by an anti-gravity casting method of metal mold low-pressure casting, counter-pressure casting and pressure-regulating casting.
The cooling system of traditional antigravity casting all is directly got from workshop recirculated cooling water (be cooling tower water supply), and the main shortcoming has: the temperature of the cooling water changes along with the change of seasons, and the water contains air and chloride, so that microorganisms are easy to breed; the traditional filter screen is used for filtering, so that scale is easily generated, and rust is generated, so that a pipeline is blocked, and the on-off solenoid valve is damaged; for the casting equipment for producing large-size complex castings, the multi-channel cooling channels with 64 channels and 128 channels are configured, and the consumption of cooling water is large. In addition, in the field layout of traditional low-pressure or differential pressure casting, the distance from a cooling cabinet to the center of equipment is about 5-8 m, namely the distance from a water outlet of the cooling cabinet to a water inlet of a lower equipment mould is about 10 m, and the distance from the cooling cabinet to the water inlet of the lower equipment mould is about 18 m, when casting and cooling are carried out, cooling water can enter a mould through a pipeline of 10-18 m, and after cooling is finished, water in the pipeline is blown out by compressed air, so that not only is cooling delay caused, but also the cooling efficiency of a casting is influenced, forming difficulty or casting defects are caused, and a large amount of waste of the cooling water is also caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a dual-cycle non-delay cooling system suitable for anti-gravity casting equipment with low pressure, differential pressure, pressure regulation and the like.
In order to achieve the purpose, the complete technical scheme of the invention comprises the following steps:
the double-circulation non-delay cooling system comprises an external circulation unit and an internal circulation unit, wherein the internal circulation unit comprises a water tank, the water tank is connected with a front-end filter through a pipeline, the front-end filter is connected with a cooled water pipeline of the plate heat exchanger through a water delivery pressure pump, the front end of the plate heat exchanger is connected with a fine filter, the front end of the fine filter is connected with a multi-equipment common interface, and the multi-equipment common interface is connected with a multi-path cooling branch pipeline;
each cooling branch pipeline is respectively provided with a single-path water electromagnetic valve and is connected with a mould non-delay cooling module, the mould non-delay cooling module comprises an upper module and a lower module, the upper module is placed on a movable template of low-pressure casting equipment, and the lower module is placed on a working platform of the low-pressure casting equipment;
the lower module comprises a water way one-way valve, the rear part of the water way one-way valve is connected with each cooling branch pipeline, the front end of the water way one-way valve is connected with a mold cooling water inlet, and the water way one-way valve is opened when the pressure of cooling water on the cooling branch pipelines is greater than a first pressure value, so that the cooling water enters the mold cooling water inlet; closing when the cooling water pressure on the cooling branch line is less than the first pressure value;
the upper die block comprises a gas path one-way valve, the gas path one-way valve is connected with a compressed air path, a gas path electromagnetic valve is arranged on the compressed air path, and the gas path one-way valve is opened when the compressed air pressure on the compressed air path is greater than a second pressure value and enables the compressed air to enter a die cooling water inlet; when the pressure of the compressed air on the compressed air path is smaller than the second pressure value, closing the valve;
the external circulation unit comprises a cooling water line on the plate heat exchanger for heat exchange cooling.
And the water tank is provided with a high liquid level water stop and supplement switch and a low liquid level water alarm and supplement switch.
The first pressure value is greater than 0.5Bar.
The water used by the external circulation unit is workshop cooling water or industrial circulating water.
In the plate heat exchanger, a thermostat is arranged on a water inlet pipe of the cooling water pipeline and a water outlet pipe of the cooled water pipeline, so that the water temperature is ensured to be 25 ℃.
And a cooling water pipeline of the plate type heat exchanger is provided with two pressure switches 1Bar and 3Bar, and when the water outlet pressure is lower than 1Bar or higher than 3Bar, the alarm prompts cooling fault and the alarm is transmitted to a host machine operation interface for display.
A pressure switch of 3.5Bar is arranged on a cooled water pipeline of the plate heat exchanger, when the water outlet pressure is higher than 3.5Bar, a warning is given to prompt a fault, and the fault is transmitted to a host operation interface for display.
The method for cooling by using the double-circulation non-delay cooling system of the low-pressure casting equipment comprises the steps that water in a water tank passes through a front-end filter, is conveyed to a plate-type heat exchanger by a water delivery pressure pump for cooling, passes through a fine filter, goes to each cooling branch pipeline through a multi-equipment common interface, and is guided to the rear end of a waterway one-way valve; at the moment, an air path electromagnetic valve at the upper part of the module is opened, compressed air enters through an air path one-way valve, and enters into the mold through a mold cooling water inlet to blow off residual water in the mold, so that a casting beat is completed; and cooling water after cooling the die returns to the water tank through the water return main pipe to complete internal circulation of the water channel.
A low pressure casting apparatus with the dual cycle non-delayed cooling system.
The antigravity casting equipment comprises low-pressure casting equipment, counter-pressure casting equipment and pressure-regulating casting equipment.
Compared with the prior art, the non-delay cooling system has the advantages that:
1. cooling water is directly led to the inlet of the die, so that the pressure loss caused by overlong pipelines is reduced, the cooling effect is more obvious, the cooling delay is eliminated, and the casting beat is met; and a closed pipeline is adopted, so that the water loss is small, the pipeline is isolated from air, microorganisms are not easy to breed, and the pipeline is not easy to block.
2.1 sets of circulating systems can be used by a plurality of devices, and energy is saved by recycling the main pipe; the waste of cooling water is avoided, and the cooling device is particularly suitable for equipment with a large number of cooling paths.
3. The plate heat exchanger realizes forced cooling and improves the circulating cooling multiplying power; thermostats are respectively arranged on a water inlet pipe of a cooling water pipeline and a water outlet pipe of a cooled water pipeline of the plate heat exchanger, the water temperature is ensured to be 25 ℃, the influence caused by seasonal changes is eliminated, and the thermostat is transmitted to a host operation interface for displaying, so that the thermostat is more visual.
4. A fine filter is adopted, the filtering precision is 5-10 microns, chlorine, organic chemical substances and suspended particles in water can be effectively removed, the pipeline is prevented from being corroded, and the risk of pipeline blockage is reduced; and the maintenance is convenient, the stop valves at the front end and the rear end of the fine filter are only required to be closed periodically, and the filter element in the fine filter is replaced, so that the workload of descaling the pipeline is reduced.
5. The automatic water replenishing switch with low liquid level and the automatic water stopping switch with high liquid level are added, so that automatic water replenishing and water stopping are realized.
Drawings
FIG. 1 is a schematic view of a dual cycle system of the cooling system of the present invention.
FIG. 2 is a schematic diagram of the cooling system of the present invention without delay.
Fig. 3 is a three-dimensional structure diagram of the cooling system without time delay.
In the figure, 1-a water tank, 2-a low liquid level alarm water replenishing switch, 3-a high liquid level water replenishing stopping switch, 4-a front end filter, 5-a plate type heat exchanger, 6-a fine filter, 7-a multi-equipment common interface, 8-cooling branch pipelines, 9-a water path one-way valve, 10-a cooling water inlet, 11-a gas path one-way valve, 12-a gas path electromagnetic valve and 13-a gas path.
Detailed Description
The technical solutions of the present invention will be described in further detail below with reference to the drawings of the present invention, and it should be understood that the described embodiments are only illustrative and are not intended to limit the present application.
As shown in figure 1, the double-circulation non-delay cooling system of the low-pressure casting equipment disclosed by the invention comprises an external circulation unit and an internal circulation unit, wherein the internal circulation unit comprises a water tank 1, and a high-liquid-level water-replenishing stopping switch 3 and a low-liquid-level water-replenishing alarming switch 2 are arranged on the water tank, so that automatic water replenishing and water stopping are realized. The water tank is connected with a front-end filter 4 through a pipeline, the front-end filter is connected with a cooled water pipeline of a plate heat exchanger 5 through a water delivery pressure pump, the front end of the plate heat exchanger is connected with a fine filter 6, and the front end of the fine filter is connected with a multi-equipment common interface 7 and is respectively connected with cooling branch pipelines 8.
Be equipped with the single track water solenoid valve on each cooling branch pipeline 8 respectively to connect the mould and do not have time delay cooling module, mould does not have time delay cooling module and includes module and lower module, goes up the module and places on the movable template of low pressure casting equipment, and the lower module is placed on the work platform of low pressure casting equipment.
As shown in fig. 2-3, the lower module comprises a waterway one-way valve 9, the opening pressure of the waterway one-way valve is greater than 0.5Bar, the waterway one-way valve is connected with each cooling branch pipeline 8, and the front end of the waterway one-way valve is connected with a mold cooling water inlet 10.
The upper die block comprises an air path one-way valve 11, the air path one-way valve is connected with an air path 13, and an air path electromagnetic valve 12 is arranged on the air path.
The working process of the internal circulation unit of the cooling system is as follows: the water in the water tank passes through a front-end filter, is conveyed into a plate heat exchanger by a water conveying pressure pump for cooling, passes through a fine filter, and goes to each cooling branch pipeline through a multi-equipment common interface, and the cooling water in each water channel is guided to the rear end of a water channel one-way valve; at the moment, an air passage electromagnetic valve at the upper part of the module is opened, compressed air enters through an air passage one-way valve, and due to the action of a water passage one-way valve, the compressed air can only enter the mold through a mold cooling water inlet to blow off residual water in the mold, so that a casting beat is completed; and cooling water after cooling the die returns to the water tank through the water return main pipe to complete internal circulation of the water channel.
The external circulation unit of the cooling system comprises a cooling water pipeline which is arranged on the plate heat exchanger and used for heat exchange and cooling, and the used water can use workshop cooling water and industrial circulating water.
The plate heat exchanger is additionally provided with two interfaces, one interface is used for receiving cooling inlet water of a workshop, the other interface is used for receiving return water, the water inlet pipe of the cooling water pipeline of the plate heat exchanger and the water outlet pipe of the cooled water pipeline are respectively provided with a thermostat, the water temperature is ensured to be 25 ℃, the influence caused by seasonal variation is eliminated, the water temperature of the cooling water of the equipment mold is kept at 25 ℃, when the mold is replaced, only the variable of flow needs to be adjusted, and the operation is simple and convenient.
Two pressure switches of 1Bar and 3Bar are arranged on a cooling water outlet pipeline of the plate heat exchanger, when the water outlet pressure is lower than 1Bar or higher than 3Bar, the alarm can be given to prompt cooling fault, and the alarm is transmitted to a host machine operation interface for display.
A3.5 Bar pressure switch is arranged on a cooling water pipeline of the plate heat exchanger, when the water outlet pressure is higher than 3.5Bar, a warning is given to prompt a fault, and the fault is transmitted to a host operation interface for display.
The invention also discloses low-pressure casting equipment with the double-circulation non-delay cooling system, which comprises a multi-riser-tube continuous molten pool holding furnace arranged below the frame; the multi-riser-pipe continuous molten pool heat preservation furnace at least comprises a furnace body, a multi-riser-pipe furnace cover, a radiation heating rod and a furnace body air inlet mechanism; the furnace body is used for storing and insulating molten metal aluminum; a liquid lifting pipe system is arranged on a multi-liquid lifting pipe furnace cover, and specifically, a plurality of liquid lifting pipe interfaces are configured on the furnace cover; the liquid lifting pipe system is formed by a plurality of liquid lifting pipe connectors, seven mounting grooves are sequentially formed in the inner wall of the furnace cover from the edge to the center and are respectively provided with seven radiant heating rods, and after the electrodes on two sides are electrified, the heating rods are heated and carry out radiant heating on the aluminum water.
Thermocouples are respectively arranged above and below the furnace wall in the width direction and the length direction of the furnace wall, the thermocouples transmit the measured temperature values to the PLC in real time, the PLC obtains the real-time temperature values of the upper thermocouples and calculates the average value to obtain the upper real-time average temperature value T, and obtains the real-time temperature values of the lower thermocouples and calculates the average value to obtain the lower real-time average temperature value T'. And monitoring according to a preset critical value A related to the upper average temperature, a critical value B related to the lower average temperature and a critical value C of the difference between the upper average temperature and the lower average temperature.
The regulation and control conditions are as follows: when the upper real-time average temperature value is smaller than a critical value A; the real-time average temperature value below is smaller than a critical value B; and the difference between the upper average temperature value and the lower temperature value is less than a critical value C, namely, the regulation and control condition is met and the regulation and control is triggered. And then the aluminum liquid in the furnace can realize temperature balance through a conduction process.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. The low-pressure casting equipment with the double-circulation non-delay cooling system is characterized in that the double-circulation non-delay cooling system comprises an external circulation unit and an internal circulation unit, the internal circulation unit comprises a water tank, the water tank is connected with a front-end filter through a pipeline, the front-end filter is connected with a cooled water pipeline of a plate heat exchanger through a water delivery pressure pump, the front end of the plate heat exchanger is connected with a fine filter, the front end of the fine filter is connected with a multi-equipment common interface, and the multi-equipment common interface is connected with a multi-path cooling branch pipeline;
the cooling branch pipelines are respectively provided with a single-path water electromagnetic valve and connected with a mould non-delay cooling module, the mould non-delay cooling module comprises an upper module and a lower module, the upper module is placed on a movable template of low-pressure casting equipment, and the lower module is placed on a working platform of the low-pressure casting equipment;
the lower module comprises a waterway one-way valve, the rear part of the waterway one-way valve is connected with each cooling branch pipeline, the front end of the waterway one-way valve is connected with a mold cooling water inlet, and the waterway one-way valve is opened when the pressure of cooling water on the cooling branch pipelines is greater than a first pressure value, so that the cooling water enters the mold cooling water inlet; closing when the cooling water pressure on the cooling branch pipeline is less than the first pressure value;
the upper die block comprises a gas path one-way valve, the gas path one-way valve is connected with a compressed air path, a gas path electromagnetic valve is arranged on the compressed air path, and the gas path one-way valve is opened when the compressed air pressure on the compressed air path is greater than a second pressure value and enables the compressed air to enter a die cooling water inlet; when the pressure of the compressed air on the compressed air path is smaller than the second pressure value, closing the valve;
the external circulation unit comprises a cooling water pipeline which is arranged on the plate heat exchanger and used for exchanging heat and cooling;
the low-pressure casting equipment comprises a multi-riser tube continuous molten pool heat preservation furnace arranged below the frame; the multi-riser-tube continuous molten pool heat preservation furnace is characterized in that thermocouples are respectively arranged above and below the furnace wall in the width direction and the length direction of the furnace wall, the thermocouples transmit the measured temperature values to a PLC in real time, the PLC obtains the real-time temperature values of the thermocouples above and calculates the average value to obtain the real-time average temperature value T above, obtains the real-time average temperature value T 'below by obtaining the real-time average temperature value T' below, and monitors according to a preset critical value A related to the average temperature above, a critical value B related to the average temperature below and a critical value C of the difference between the average temperature value above and the temperature value below; when the upper real-time average temperature value is smaller than a critical value A; the real-time average temperature value below is smaller than a critical value B; and the difference between the upper average temperature value and the lower temperature value is less than a critical value C, namely, the regulation and control condition is met and the regulation and control is triggered.
2. The low pressure casting apparatus with a dual cycle, non-delayed cooling system of claim 1, wherein the water tank is provided with a high level stop water replenishment switch and a low level alarm water replenishment switch.
3. The low pressure casting apparatus with a dual cycle, non-delayed cooling system of claim 1, wherein the first pressure value is greater than 0.5Bar.
4. The low pressure casting apparatus with a dual cycle, non-delayed cooling system of claim 1, wherein the water used in the external circulation unit is plant cooling water or industrial circulating water.
5. The low pressure casting apparatus with a dual cycle non-delay cooling system as claimed in claim 1, wherein the plate heat exchanger is configured such that the inlet pipe of the cooling water line and the outlet pipe of the cooled water line are provided with thermostats to ensure a water temperature of 25 ℃.
6. The low-pressure casting equipment with the double-circulation non-delay cooling system as claimed in claim 1, wherein the cooling water pipeline of the plate heat exchanger is provided with two pressure switches of 1Bar and 3Bar, and when the effluent water pressure is lower than 1Bar or higher than 3Bar, an alarm is given to prompt cooling failure and is remotely transmitted to a host machine operation interface for display.
7. The low pressure casting apparatus with a dual cycle non-delay cooling system as claimed in claim 1, wherein the plate heat exchanger is provided with a 3.5Bar pressure switch on the cooling water pipeline, and when the water outlet pressure is higher than 3.5Bar, an alarm is given to indicate a fault and the alarm is transmitted to the host machine operation interface for display.
8. The method for cooling the low-pressure casting equipment by using the dual-cycle non-delay cooling system as claimed in any one of claims 1 to 7, wherein the water in the water tank passes through the front-end filter, is conveyed into the plate heat exchanger by the water delivery pressure pump for cooling, passes through the fine filter, goes to each cooling branch pipeline through the multi-equipment common interface, and is guided to the rear end of the water way check valve; at the moment, an air path electromagnetic valve at the upper part of the module is opened, compressed air enters through an air path one-way valve, and enters into the mold through a mold cooling water inlet, so that residual water in the mold is blown off, and a casting beat is finished; and cooling water after cooling the die returns to the water tank through a water return main pipe to complete internal circulation of the water channel.
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| CN202210880821.3A CN115070017B (en) | 2022-07-26 | 2022-07-26 | Dual-cycle non-delay cooling system of antigravity casting equipment |
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| CN202210880821.3A CN115070017B (en) | 2022-07-26 | 2022-07-26 | Dual-cycle non-delay cooling system of antigravity casting equipment |
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| CN115070017B true CN115070017B (en) | 2022-11-11 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07133946A (en) * | 1993-11-10 | 1995-05-23 | Furukawa Electric Co Ltd:The | Air-conditioning system |
| CN102189241B (en) * | 2010-03-03 | 2013-06-19 | 广东鸿图科技股份有限公司 | Cooling control method and device for mold core needle of die casting mold |
| CN202037830U (en) * | 2011-04-29 | 2011-11-16 | 川田机械制造(上海)有限公司 | Water-oil dual-purpose mould temperature control unit |
| CN104343524B (en) * | 2014-08-28 | 2016-08-31 | 河南柴油机重工有限责任公司 | A kind of external gas machine modular cooling device and cooling means |
| CN104368789B (en) * | 2014-11-24 | 2016-08-31 | 广东鸿图南通压铸有限公司 | A kind of die casting temperature control equipment and control method |
| CN204413116U (en) * | 2015-01-09 | 2015-06-24 | 大连职业技术学院 | A kind of water type die heater |
| CN110385843A (en) * | 2019-08-26 | 2019-10-29 | 东莞市美得机械科技有限公司 | Cold-hot integrated die heater |
| CN113798471A (en) * | 2021-06-03 | 2021-12-17 | 宁波新昱智能科技有限公司 | High-temperature die-casting water temperature machine |
| CN114012066A (en) * | 2021-11-17 | 2022-02-08 | 苏州奥德高端装备股份有限公司 | Intelligent temperature control device for high-pressure casting mold |
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