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Intelligent type sand mulling control method

A control method and intelligent technology, applied in the direction of control devices, special data processing applications, instruments, etc., can solve the problems of low productivity, inaccurate control accuracy, high material consumption, etc., and achieve the effect of saving materials and saving materials

Inactive Publication Date: 2007-12-05
SHENYANG XUNTIAN TECH
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Problems solved by technology

[0003] In order to overcome the shortcomings of existing resin sand control in sand casting, such as high energy and material consumption, inaccurate control accuracy, low productivity, and small sand temperature adaptation range, the present invention provides an intelligent sand mixing control method. The invention can not only automatically calculate the proportional relationship between the sand temperature and mold-drawing time and various materials, but also use the frequency conversion speed regulation function to accurately control the amount of various materials added

Method used

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  • Intelligent type sand mulling control method

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Embodiment Construction

[0032] known conditions:

[0033] For a sand mixer with an output of 30 tons per hour, 30,000 kg / hour, when operating as surface sand, the amount of resin used is 1.0% of the sand amount, the sand temperature at that time is 25°C, the mold release time is 40 minutes, and the total curing agent The relative resin ratio (%) of consumption is 40%,

[0034] The mediation coefficient b is 2 when the mold drawing time is 40 minutes, which is the mediation coefficient extracted from the expert knowledge base.

[0035] Fast curing agent specific gravity = 1.05

[0036] Slow curing agent specific gravity = 1.15

[0037] Resin specific gravity = 1.15.

[0038] Solve:

[0039] Resin amount = sand flow rate * resin addition amount (surface sand) (%)

[0040] Resin amount = 30000*1.0% = 300 kg / hour = 5000 g / min

[0041] Fast curing dose = sand flow * resin addition (%) * total curing agent relative to resin ratio (%) * (k1*x+k2-b)

[0042] Wherein, x=temperature, k2=100, K1=-100 / 40=...

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Abstract

The present invention provides one kind of intelligent sand mixing controlling method. The key point of the present invention includes establishing the mathematic model of the relation among sand temperature, facing sand / back sand amount, demolding time, and the amount of fast curing agent and slow curing agent; calculating the amount of curing agent and calculating the rotation speed of conveying pump. The present invention adopts mathematic model and curve fitting technology in fitting the nonlinear relation of pump flow rate, has the active effects of accurate material compounding, saving material and raised product quality.

Description

technical field [0001] The invention relates to a method for controlling the addition of resin and curing agent in sand casting. Background technique [0002] In sand casting, resins and curing agents are added to the sand. At present, manual adjustment or semi-automatic adjustment is used to adjust the proportional relationship between the sand temperature and the mold ejection time and various raw materials. Since there are many parameters to be adjusted and the relationship between the parameters is complicated, the control accuracy is inaccurate, and energy and material consumption High, low productivity, narrow sand temperature adaptation range, etc. The addition of materials needs to be transported by pumps. However, the relationship between the flow rate of the pump and the speed of the pump is not very good, especially at low and high speeds. At present, the flow control of the pump is only based on the linear relationship between the flow rate and the pump speed....

Claims

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Application Information

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IPC IPC(8): B22C19/04G06F19/00
Inventor 张毅
Owner SHENYANG XUNTIAN TECH
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