Aluminum plate fin type radiator vacuum brazing furnace temperature field equilibrium method
A technology of vacuum brazing furnace and temperature field, which is applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve problems such as product overheating, product incomplete welding, and lower product brazing pass rate, so as to improve Effect of improving brazing quality and temperature uniformity
Active Publication Date: 2011-07-27
GUIZHOU YONGHONG AVIATION MACHINERY
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Problems solved by technology
Due to the large temperature fluctuations in different areas in the vacuum furnace, there is an alternating process of high and low temperature areas, which leads to a large temperature difference between products in different positions; so products in the high temperature area sometimes have overburning phenomenon, while those in the low temperature area The product also has incomplete penetration, which reduces the brazing pass rate of the product to a certain extent, so there is an urgent need for a method that can improve the temperature uniformity of the product in the vacuum furnace
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[0043] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, and the specific methods are as follows:
[0044] 1) Survey and map the vacuum brazing furnace, and use ANSYS software to establish a computer-simulated furnace body simulation model with a simulated heating belt inside; such as figure 2 Shown: the furnace body simulation model is composed of a furnace body model 4, a plurality of simulated heating belts 7 arranged in the furnace body model, and a plurality of product models 6 placed in the furnace body model 4 through a fixture 5. The heating belt 7 conducts heat transfer with the product model 6 by means of thermal radiation;
[0045] 2) After the product is surveyed and mapped, according to the following heat conduction formula Q = - kA ∂ t ∂ ...
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The invention discloses a temperature equalization method for the temperature field of an aluminum plate-fin typed radiator vacuum brazing furnace, which belongs to a temperature equalization method for the temperature field of a vacuum brazing furnace and aims at providing a method for guaranteeing a more uniform product temperature at varied positions in the vacuum furnace. The invention has specific methods that: 1) a furnace body mathematical model is established; 2) a product mathematical model is established according to a heat conduction formula; 3) a simulation heating curve is set and a simulation temperature field is established on a computer according to an actual art heating curve and a thermal radiation formula; 4) the simulation heating curve is modified according to the actual temperature; 5) the putting position of the product mathematical model in the furnace body mathematical model is adjusted according to the distribution of the high temperature and low temperature areas of simulation temperature fields; 6) the putting of the products in actual production is guided according to rules for putting products and the correctness of the simulation heating curve is validated according to the actual temperature. The temperature equalization method provided by the invention can effectively improve the uniform temperature of products in the vacuum furnace, thus beingan ideal method for improving the vacuum brazing quality of the aluminum plate-fin typed radiator.
Description
Technical field: [0001] The invention relates to a method for uniforming the temperature field of a vacuum furnace, in particular to a method for uniforming the temperature field of a vacuum brazing furnace. Background technique: [0002] Currently, when brazing a product (aluminum plate-fin radiator) in a vacuum furnace, there are few requirements regarding the placement of the product in the vacuum furnace. Due to the large temperature fluctuations in different areas in the vacuum furnace, there is an alternating process of high and low temperature areas, which leads to great differences in product temperature in different positions; therefore, products in the high temperature area sometimes have overburning phenomenon, while products in the low temperature area The product also has incomplete penetration, which reduces the brazing pass rate of the product to a certain extent. Therefore, there is an urgent need for a method that can improve the temperature uniformity of th...
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IPC IPC(8): G06F17/50
Inventor 高振宇王家喜
Owner GUIZHOU YONGHONG AVIATION MACHINERY