CN-116728833-B - Matching regulation and control method for grid rib laying process parameters

CN116728833BCN 116728833 BCN116728833 BCN 116728833BCN-116728833-B

Abstract

The invention discloses a matching regulation and control method of grid rib laying process parameters, which considers fiber tow tension in researching factors influencing the laying process parameters, keeps the stability of the fiber tension, is beneficial to improving the product quality of a finished piece, optimizes the laying process parameters through qualitative analysis of a grid rib composite material laying quality judgment standard and quantitative calculation of prepreg tow bonding performance and the laying process parameters, and also provides a grid rib laying process parameter matching regulation and control mechanism by analyzing the internal logic relation of the laying process parameters, and sets forth a forming process parameter real-time control scheme for regulating grid rib laying tension, laying temperature and laying pressure based on the change of the laying rate, thereby laying a foundation for promoting the application of a grid rib laying process technology.

Inventors

LUO RUI
HU WEIYE
ZHONG XIAOCHUN
CHU QIYI

Assignees

南京晨光集团有限责任公司

Dates

Publication Date: 20260512
Application Date: 20230619

Claims (6)

1. A matching regulation and control method for grid rib laying process parameters is characterized by comprising the following steps: Establishing a relational expression between the prepreg tow stripping force F and the laying process parameters of the laying temperature T, the laying speed v, the laying pressure P and the laying tension F; The relation between the prepreg tow stripping force F and the laying process parameters of the laying temperature T, the laying speed v, the laying pressure P and the laying tension F is as follows: wherein k 1 、k 2 is a parameter coefficient affecting the laying process, and b is a laying affecting factor; Determining the value range of the technological parameters, carrying out 4 groups of technological laying tests according to the coupling corresponding relation among the laying parameters, and carrying out the numerical value of the coefficient in the relation; the process of obtaining the numerical value of the coefficient in the relation is as follows: Record intermediate variables Wherein T i 、v i 、P i 、f i is the corresponding laying temperature, laying speed, laying pressure and laying tension of the i-th group of process laying test; The coefficient function L (k 1 ,k 2 , b) satisfies: Wherein F i is the stripping force corresponding to the i-th group of process laying test, and F (X i ) is the relation of converting the stripping force into an intermediate variable X i ; Combined stand 、、 Solving for the values of k 1 、k 2 , b; establishing equations of the laying tension f and the laying speed v, the laying temperature T and the laying speed v, and the laying pressure P and the laying speed v; equations of the laying tension f and the laying speed v, the laying temperature T and the laying speed v, and the laying pressure P and the laying speed v are respectively: a 1 、a 2 、a 3 、b 1 、b 2 、b 3 、c 1 、c 2 、c 3 is the corresponding equation coefficient; Measuring the stripping force F 0 of the prepreg tows when the laying quality reaches the optimal state, and reversely pushing according to the stripping force of the prepreg tows in the optimal state to obtain the optimal laying speed v 0 ; According to the optimal laying speed v 0 , the optimal laying tension f 0 , the optimal laying temperature T 0 and the optimal laying pressure P 0 are obtained.
2. The method for adjusting and controlling the matching performance of the grid rib laying process parameters according to claim 1 is characterized in that during a process laying test, the tension of fiber tows is firstly adjusted from small to large until the fiber tows are laid straight to obtain a laying speed matched with the set fiber tension, then heating temperature is determined according to the laying speed, the heating temperature matched with the set laying speed is obtained by controlling the temperature range, the pressure of a flexible press roller is determined according to the laying speed, the laying pressure of the flexible press roller is adjusted according to the action time between the laying pressure and the laying speed through the flexible press roller and the surface of a die, the laying pressure of the flexible press roller is adjusted, and the laying pressure matched with the set laying speed is obtained, and 4 groups of process laying tests are conducted.
3. A lattice reinforcement placement process parameter matching regulation system for regulating optimal process parameters obtained by the lattice reinforcement placement process parameter matching regulation method according to any one of claims 1 to 2, comprising: the laying speed control system is used for controlling the laying speed of the prepreg tows; the laying tension control system is used for measuring the tension of the prepreg tows, transmitting the tension output signal of the tension to the laying speed control system, and adjusting the laying speed until the tension is stable; The laying temperature control system is used for detecting the laying speed in real time and adjusting the laying temperature; The laying pressure control system is used for controlling the laying pressure, and the laying pressure is regulated in real time along with the change of the laying speed.
4. The grid rib laying process parameter matching regulation and control system according to claim 3, wherein the laying tension control system comprises a servo motor, an angle encoder and a speed encoder, wherein the servo motor and a cylinder are used as executing elements, the angle encoder and the speed encoder are used as feedback elements to form a closed loop system, tension of prepreg tows is measured through a tension sensor, the speed encoder is used for monitoring the speed of a laying head in real time, and the laying speed is regulated according to data in the sensor until the tension is stable.
5. The grid rib laying process parameter matching regulation and control system according to claim 3 is characterized in that the laying temperature control system comprises an infrared heating lamp, a speed encoder is adopted to detect the laying speed in real time on line, the analog voltage is calculated and output according to a pulse signal input by the speed encoder in real time, the operating voltage of the infrared lamp is controlled through a voltage regulating module, the output power of the heating lamp is regulated, and the laying temperature is regulated.
6. The matching regulation and control system for the grid rib laying process parameters according to claim 5, wherein the laying pressure is set to be upper and lower limits, and extreme values are output as laying pressure values when the upper and lower limits are exceeded, the pressure values are converted into voltage signals of the pressure regulating valve, control signals are sent to the pressure control system, and the cylinder air pressure is regulated through the voltage signals, so that the laying pressure is automatically regulated in real time along with the change of the laying rate.

Description

Matching regulation and control method for grid rib laying process parameters Technical Field The invention relates to manufacturing technologies in the fields of aerospace, ship manufacturing and the like, in particular to a matching regulation and control method for grid rib laying process parameters of structural parts such as aircraft wings, fuel tank space vehicles and the like. Background The composite material grid structure is a grid rib structure with lighter weight and better performance, is developed from a metal grid structure, and is widely applied to the fields of aerospace and the like due to the high specific strength, specific modulus, corrosion resistance and the like. Compared with the metal grid structure, the composite grid rib not only can ensure high strength and high rigidity, but also can lighten the mass of parts, and when an external load acts on the grid rib structure parts, the load can be transmitted along the direction of the rib. Common grid structures can be divided into triangular grid structures, rectangular grid structures and diamond grid structures according to different geometric figures formed by laying prepreg. The manufacturing process of the composite material grid structure is complex, the cost is high, and the research in China is in a starting stage, so that the grid rib laying process parameter matching regulation method has important guiding significance for the research work of the composite material grid structure manufacturing process. Factors influencing the automatic grid placement molding process of composite materials exist in the following defects: 1. Factors influencing the automatic laying molding process mainly include laying pressure, laying temperature and laying speed. However, most application researches mainly focus on single factor analysis, namely, under the condition of determining certain laying pressure and laying temperature, the influence of the laying speed on the laying process is researched, and the obtained conclusion can only determine the optimal laying speed under the condition and cannot determine the optimal laying process. 2. At present, besides the influence of the laying pressure, the laying temperature and the laying speed on the laying process of the grid ribs of the composite material, the influence of the tension of the filament bundles on the laying process is studied, and the tension of the filament bundles is an indispensable factor for determining the optimal parameters of the laying process of the grid ribs of the composite material. 3. At present, a unified laying quality evaluation standard is not formed on the composite material grid rib laying process, and the evaluation standard is mainly qualitative description and lacks quantitative analysis. Disclosure of Invention The invention aims to provide a matching regulation method of grid rib laying process parameters, which aims to overcome the defects in the background technology by researching the mutual influence relation among four parameters, namely the laying tension, the laying temperature, the laying pressure and the laying speed until the optimal laying process parameters are obtained and the optimal laying effect is achieved. The technical solution for realizing the purpose of the invention is as follows: a matching regulation and control method for grid rib laying process parameters is characterized by comprising the following steps: Establishing a relational expression between the prepreg tow stripping force F and the laying process parameters of the laying temperature T, the laying speed v, the laying pressure P and the laying tension F; Determining the value range of the technological parameters, carrying out 4 groups of technological laying tests according to the coupling corresponding relation among the laying parameters, and carrying out the numerical value of the coefficient in the relation; establishing equations of the laying tension f and the laying speed v, the laying temperature T and the laying speed v, and the laying pressure P and the laying speed v; Measuring the stripping force F 0 of the prepreg tows when the laying quality reaches the optimal state, and reversely pushing according to the stripping force of the prepreg tows in the optimal state to obtain the optimal laying speed v 0; According to the optimal laying speed v 0, the optimal laying tension f 0, the optimal laying temperature T 0 and the optimal laying pressure P 0 are obtained. Compared with the prior art, the invention has the remarkable advantages that: 1) According to the grid rib laying process regulation and control method, the experiment times can be reduced to the greatest extent, the laying cost is reduced on the premise of guaranteeing the laying quality, and the optimal laying process parameters can be determined, so that the optimal laying effect is achieved. 2) In the process of laying the grid ribs of the composite material, the tension of fiber tows is a very i