Proportional cooling control method used for differential temperature heating technology heat treatment furnace

A control method and a technology of differential temperature heating, applied in the field of heat treatment, can solve problems such as difficult determination of the cooling slope, prolonging the production cycle, and prolonging the production cycle, so as to avoid the risk of metal overheating, shorten the production cycle, and improve production efficiency.

Pending Publication Date: 2021-10-08
BEIJING AVIATION FEIFANG MACHINERY EQUIP FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the control form of furnace gas cooling has slope cooling ( figure 2 ) and jump cooling ( image 3 ), the slope cooling can shorten the production cycle, but there is a high risk of metal overheating. Since the furnace gas temperature is higher than the target temperature of the metal, there is a risk of metal overheating. The cooling slope is not easy to determine, and the slope is too small to easily overheat the metal. , the slope is too large and the production cycle will be extended, which is not conducive to improving production efficiency; jump cooling can effectively reduce the risk of metal overheating, but the production cycle will be extended

Method used

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  • Proportional cooling control method used for differential temperature heating technology heat treatment furnace
  • Proportional cooling control method used for differential temperature heating technology heat treatment furnace
  • Proportional cooling control method used for differential temperature heating technology heat treatment furnace

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Embodiment Construction

[0032] 1. Hardware configuration

[0033] The basic configuration requirements of the heating or heat treatment furnace using this method are as follows:

[0034] 1. Heating system and cooling system (directly mixed with cold air or using heat exchanger to cool down);

[0035] 2. The process control is completed by a programmable controller to realize the start-stop and switching of the heating system and the cooling system, and the process settings are input and set by the computer man-machine interface;

[0036] 3. A thermocouple is installed in the furnace to control and detect the temperature of the furnace gas. The programmable controller reserves a metal temperature detection channel. During production, the metal detection thermocouple is connected to this interface to collect the metal temperature and monitor the process. control.

[0037] 2. Control scheme

[0038] The programmable controller detects the furnace gas temperature and product temperature (metal tempera...

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Abstract

The invention belongs to the technical field of heat treatment, and particularly relates to a proportional cooling control method used for a differential temperature heating technology heat treatment furnace. At present, an excessively-small slope of slope cooling is prone to metal overtemperature, and the production cycle can be prolonged due to an excessively-large slope; and the production period of jump cooling is long. According to the proportional cooling control method used for the differential temperature heating technology heat treatment furnace, the metal temperature participates in furnace gas temperature control, and the metal temperature and an original PID temperature control algorithm of a control system are combined, so that the production period is greatly shortened, and meanwhile, the risk of metal overtemperature is avoided; and an effect of automatically controlling a differential temperature cooling process is achieved, the production period is shortened, and the purpose of reducing the risk of metal overtemperature is achieved.

Description

technical field [0001] The method belongs to the technical field of heat treatment, and specifically relates to a proportional cooling control method for a heat treatment furnace in a differential temperature heating process, and is used for automatic temperature control of products and furnace gas when heating or heat treatment equipment executes a differential temperature heating process. Background technique [0002] When the product is heated or heat treated, depending on the material of the product, the required heating or heat treatment process is also different. In terms of the relationship between the temperature of the furnace gas and the product (eg: metal), it can be roughly divided into "isothermal heating" and " Differential temperature heating" two categories. isothermal heating ( figure 1 ): During the heating process, (set the furnace gas temperature to be equal to the metal target temperature), keep the furnace gas warm until the metal temperature reaches t...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D1/84
CPCC21D11/005C21D1/84
Inventor 李国华高玉峰万明李静黄环路学刚
Owner BEIJING AVIATION FEIFANG MACHINERY EQUIP FACTORY
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