Author(s)

Jiahua Wu

Corresponding Author

Jiahua Wu

Abstract

The rewelding furnace is an important equipment for the production of integrated circuit boards, and its internal process temperature will affect the product quality. For the rewelding furnace with given equipment parameters, this paper establishes a mathematical model to study the temperature change in the center of the welding zone under different transmission speed and temperature zone temperature. According to the known parameters and the experimental data, the specific characteristics of the interaction between the temperature fields in each temperature zone are analyzed, and the temperature gradient distribution is obtained. Then according to the Fourier heat conduction law, the environmental temperature field of the rewelding furnace is obtained, and then the model of the environmental temperature field in the furnace is established. By calculating the Bevo number of the welding pad, it is found that the heat transfer process of the welding pad can be regarded as a zero-dimensional unsteady heat conduction process, and a lumped parameter model can be established to solve the temperature variation law in the center of the welding zone. The planning problem of finding the maximum value of transmission speed under the constraint of process limits. Through the environmental temperature field model and lumped parameter model, the solution results of the device meet the process requirements of weldment processing, and the furnace temperature curve can be solved very well, so as to facilitate the analysis and study of the processing technology of the rewelding machine.

Keywords

Environmental temperature field model; lumped parameter model; CFtool; furnace temperature curve; iterative solution