Intelligent temperature control system and intelligent temperature control method for low-pressure cast aluminum alloy melt
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A technology of aluminum alloy melt and low pressure casting, applied in the field of aluminum alloy casting, can solve the problems of unmeasurable temperature of alloy melt, fluctuation of casting quality, low control accuracy, etc., and achieve rapid convergence, accuracy, and accurate control. Effect
Active Publication Date: 2022-03-11
BEIJING HANGXING MACHINERY MFG CO LTD
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[0005] In view of the above analysis, the present invention aims to provide an intelligent temperature control system and an intelligent temperature control method for low-pressure casting aluminum alloy melts, which are used to solve the problem of low accuracy of manual measurement and control before pouring in the existing smelting system and the sealing of the low-pressure casting furnace body. The temperature of the post-alloy melt is unpredictable and difficult to control, resulting in fluctuations in casting quality
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Embodiment 1
[0126] In this embodiment, β is a temperature control coefficient, and the temperature control coefficient β is 0.05 according to the experience of the experience.
[0127] It is assumed that the aluminum liquid has a real time T3 of 700 ° C, and the furnace gas balance temperature T2 is set higher than that of the aluminum fluid process control temperature 15 ° C, that is, the oven gas balance temperature T2 is 715 ° C, which is substantially stable at this temperature.
[0128] To increase the temperature of the aluminum liquid by 5 ° C, ie, ΔT2 = 5 ° C, i.e., the process control temperature T4 = 705 ° C of the aluminum liquid, and its corresponding furnace gas balance temperature T2 is 720 ° C. Set the temperature control starts to T0, the temperature control is over to T1. The calculation process and result of the furnace gas temperature difference ΔT1 (t0) at the temperature initial stage T0 is:
[0129] △ T1 (t0) = (T4-T3 (T0)) / β;
[0130] △ T1 (T0) = (705 ° C -700 ° C) / ...
Embodiment 2
[0145] In the above-described embodiment 1, if the actual temperature control coefficient β = ΔT2 / △ T1 = 2.5 ° C / 50 ° C = 0.05 valuation is not accurate, in a TM time, if the furnace real time temperature rises to the highest value of 770 ° C The heating was started, that is, the furnace gas control temperature T1 (Tm) at this time is also 770 ° C, and the measured aluminum liquid at this time is 702.5 ° C. As the furnace temperature drops to the furnace gas balance temperature T2, the aluminum liquid real-time temperature T3 (T1) changes the process to control the temperature T4, and becomes 705.5 ° C. Then during the cooling process, the actual furnace temperature difference ΔT1 is:
[0146] △ T1 = T1 (Tm) -t2 = 770 ° C -720 ° C = 50 ° C;
[0147]The actual aluminum fluid temperature difference ΔT2 is:
[0148] △ T2 = T4-T3 (Tm) = 705.5 ° C -702.5 ° C = 3 ° C;
[0149] The actual temperature control coefficient β is:
[0150] β = ΔT2 / △ T1 = 3 ° C / 50 ° C = 0.06.
[0151] ...
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Abstract
The invention relates to an intelligent temperature control system and method for a low-pressure casting aluminum alloy melt, belongs to the technical field of aluminum alloy casting, and solves the problems that the manual measurement and control precision is low before pouring of an existing smelting system, the temperature of the alloy melt cannot be measured and is not easy to control after a low-pressure casting furnace body is sealed, and the quality of a casting is fluctuated. The intelligent temperature control system comprises a resistance furnace, a temperature real-time measuring unit, a heating device and an intelligent temperature control unit, the intelligent temperature control unit is respectively in signal integration with the temperature real-time measurement unit and the heating device, the temperature real-time measurement unit feeds back the measured furnace gas temperature and molten aluminum temperature to the intelligent temperature control unit, and the intelligent temperature control unit can control the heating device to heat or stop heating the resistance furnace according to the feedback information. The control precision and efficiency of the aluminum alloy melt in the low-pressure aluminum alloy pouring process can be greatly improved, stable control over the aluminum alloy melt is achieved, and then the quality stability of casting products is improved.
Description
Technical field [0001] The present invention relates to the field of aluminum alloy casting techniques, and more particularly to a smart temperature control system and intelligent temperature control method of low pressure cast aluminum alloy melt. Background technique [0002] Existing aerospace, aerospace high-quality aluminum alloy castings generally use low and differential pressure casting processes. Among them, aluminum alloy melts and castings are critical processes of casting process, and the quality of control is directly determined by the quality of the casting products. In this process, the melt temperature is very important process parameters. During the actual operation, the temperature of the aluminum alloy melt is generally manually measured by manual handheld thermocouple measuring equipment. After the measurement is completed, the melt temperature is controlled according to the process parameters. In the cast, since the melt temperature cannot be measured, it mak...
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