Computer aided design of the hottest winding line

2022-09-27
  • Detail

Computer aided design of winding line and transmission system

Abstract: in this paper, visua1c++6.0 is used as the program development language to develop the computer aided design software of mechanically controlled filament winding machine line and transmission system. By giving the basic parameters of winding products, the basic laws of filament winding type and the actual transmission warp, fixed transmission ratio, change gear transmission ratio The design of the transmission system, such as the speed of the main shaft, the length of the ring chain, the number of chain links, the pitch diameter of the sprocket and the arrangement of the sprocket, provides a simple, fast and accurate way for engineers and technicians to design the winding line type and transmission system of the filament winding machine

key words: Computer Aided Design of filament winding machine linear transmission system

1 preface

mechanical control chain drive filament winding machine winding motion control is achieved through the mechanical transmission system, so as to achieve the required winding line. The winding mode is realized by the relative movement of the wire guide head (also known as the wire nozzle) and the core mold. The winding process is applicable to carbon fiber or glass fiber pipes, containers, storage tanks, rocket engine shells and other products. Due to the different types and specifications of winding products, it is necessary to design different winding machines. When a certain parameter of the winding product is changed, the design of the winding machine, especially the design of its transmission system, should be changed accordingly, and the calculation is cumbersome, and manual calculation is very inconvenient. In view of this situation, the author compiled the software to reduce the workload of engineering designers

with the rapid development of computer technology and the development of program development language, we can choose different programming languages, programming methods and ideas to achieve. This paper selects visua1c + + 6.0 of Microsoft company as the program development language, and realizes the computer-aided design and calculation of the filament winding machine line type and transmission system on the windows platform

2 basic idea of programming

a good program can not only achieve specific functions, but also consider the convenience of maintenance, which can be easily achieved by adopting modular programming. This program adopts the modular design of program functions, and the programming method is as follows:

2.1 the main control menu function module of the program

contains the main function menus of the program, namely, the winding type and the transmission system design. The pull-down main menu of winding type mainly includes four functional dry menus: container spiral winding, pipe spiral winding, storage tank spiral winding and circumferential winding. It is mainly used to solve the winding center angle, basic speed ratio, fine-tuning speed ratio, actual speed ratio and tangent number of various types of products; The main menu of transmission system design mainly includes four function submenus: Determination of core mold speed, transmission chain length and arrangement mode, determination of fixed transmission ratio and change gear transmission ratio. The required program function modules can be quickly activated through various functions in the menu, and the operation is simple and convenient

2.2 spiral and circumferential winding linear parameters and speed ratio determination function module

during fiber winding, the ribbon is stably and evenly covered with the surface of the core mold according to the specific wiring path. This wiring law is called the winding linear law. The design of winding line type mainly determines the winding angle, winding center angle, winding speed ratio and cutting points according to the structural design and winding process requirements of products. Because the filament winding machine is mainly used for winding containers, pipes, storage tanks and other products, and the winding line type is mainly spiral winding and circumferential winding, the author studies the program design of spiral winding and circumferential winding line type law. It includes spiral winding of containers, pipes and storage tanks, and circumferential winding of pipes, containers and storage tank barrel sections. This function module also includes four sub function modules, namely, container spiral winding and linear design function module, pipeline spiral winding and linear design function module, storage tank spiral winding and linear design function module, circumferential winding and linear design function module. Starting from the object-oriented programming idea, a dialog class is defined based on each sub function module, which is container class, pipe class, tank class and circumferential winding class, namely cvesse1, cpipe, CJAR and Chuan. They are all derived from the dialog class cdia1og. The message processing function onresnit() is added to the four dialog classes to accept messages from the keyboard and mouse. Only need to input the known product geometric parameters and process parameters in the dialog box interface with the keyboard. After the computer receives the required parameters, run the corresponding aerogel gel insulation board with high temperature resistance, low thermal conductivity, low density, high strength, green environmental protection, waterproof and non combustible and other superior performance calculation program to calculate and process the input data, and display the results in the dialog box. If the input data does not meet the design requirements, the display screen will inform you in time for modification and recalculation. Finally, onresuit() function calculates the winding angle, basic speed ratio, fine-tuning speed ratio, actual winding speed ratio, winding center angle of nonlinear section, winding center angle of linear section, winding center angle of head section and tangent number of various products and winding methods

2.3 transmission system design function module

2.3.1 core mold speed determination function module

the winding process of two axis motion, whether spiral winding or circumferential winding, is generally that the core mold axis rotates and the wire guide head (or trolley) moves back and forth along the core mold axis in a straight line, and the winding ribbon is wound to the core mold surface at a certain winding angle through the guiding wiring arrangement law of the wire guide head. In this way, the core mold speed is related to the ribbon speed, trolley speed and winding angle. Among them, the winding angle is determined by the shape and linear design of the winding product

from the perspective of technology, the ribbon speed should not be too large. Otherwise, it is easy to cause glue splashing. Generally, the V yarn is not more than 1.0m/s, but too small will reduce the productivity. There are also certain restrictions on the speed of the trolley. Excessive speed will cause vibration in the round-trip movement of the trolley, which will affect the wire arrangement accuracy. Generally, v-car shall not exceed 0.8m/s. When v yarn and V car are at the maximum limit speed, the corresponding winding angle Ao can be obtained. When the winding angle AC of the linear segment of the product obtained from the linear design is greater than a. When, the maximum speed of the core mold, n core max, must be limited by V yarn max. When AC

2.3.2 determination of chain length and ring chain arrangement function module

for mechanical control winding machine, when the geometric dimension and linear parameters of the product change, the length of the ring chain and the layout scheme of the sprocket must be changed, and it must be redesigned and replaced. By running this function module, you can quickly get the length of the chain, the number of chain links, the diameter of the sprocket pitch circle and the arrangement of the sprocket

first define a dialog class cchain and the message processing function onresuit (). Input the distance between the wire nozzle and the surface of the wound product and the pitch of the ring chain in its dialog interface, select the type and winding mode of the wound product in a group of radio buttons, and determine the winding angle, winding center angle, winding speed ratio and the diameter of the wound product transmitted in the function module by the winding line parameters and speed ratio such as the classification of spiral and circumferential raw materials. The length of the ring chain, the number of link chain The pitch diameter of the sprocket and the arrangement of the sprocket

2.3.3 fixed transmission ratio determination function module

in order to determine the specific scheme of the transmission system, it is necessary to first determine the transmission ratio of the fixed gear train in the transmission system, which is called the fixed speed ratio, including the fixed transmission ratio I of spiral winding and the fixed transmission ratio I of circumferential winding. Here, first define a dialog class cfixrate and a message processing function onresume (). Input the maximum and minimum length, maximum and minimum diameter, maximum and minimum winding angle and chain pitch of the winding product in the dialog interface, and select the spiral winding or circumferential winding mode in a group of radio buttons of winding mode, then i-screw or i-ring can be solved by the message processing function onresuit() of dialog cfixrate

2.3.4 change gear transmission ratio determination function module

for each type and the same type of products with various specifications and sizes, determine the actual speed ratio of each type of products and winding mode determined in the function module through the spiral and circumferential winding line parameters and speed ratio, determine the number of chain links and sprocket diameter determined in the function module through the sprocket and arrangement mode, and determine the fixed transmission ratio determined in the function module through the fixed transmission ratio, The transmission ratio of change gears of different types and specifications can be calculated by the message processing function onresu1t() function in the dialog box class cchangerate created

3 conclusion

this paper compiles the corresponding software in some cases by mechanically controlling the computer-aided design of the line type and transmission system of the two axis filament winding machine. It can better solve the inconvenience caused by changing the specification and winding mode of products to stabilize the extrusion volume, and the winding line type and transmission system part must be adjusted accordingly. Experiments show that the CAD software of filament winding line and transmission system can greatly shorten the design time of filament winding machine, increase efficiency, improve design accuracy, and make the design of filament winding machine more reasonable and scientific. (end)

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