Aiming at the problems of low efficiency and large workload in the current mold design process in China, a mold frame design system based on SolidWorks software development is introduced. The graphical form of the mold frame selection intelligent and manual assisted design is integrated into the injection mold frame CAD system. Form a specialized application system on the general CAD platform. This system improves mold design efficiency and shortens mold design cycle. introduction The mold industry is the basic industry in the national economy. The strength of mold manufacturing and the level of mold design have become one of the important indicators to measure the level of machinery manufacturing in a country. The design and processing level of the mold is directly related to the quality and renewal of the product. With the development of industry, people pay more and more attention to how to shorten the production cycle of mold design and processing and how to improve the quality of mold processing. Traditional two-dimensional mold design and manufacturing methods can not meet the requirements of timely updating and improving quality. The mold CAD/CAM technology of advanced countries has entered the practical stage in the mid-1980s. Commercialized series of software has been sold in the market, and its application has brought enormous social and economic benefits. In China, there is still a certain gap between the application and innovation of this technology compared with foreign countries, and it is only in the early stage of development and use. Therefore, the research on mold CAD technology has certain practical application significance in China. This paper introduces a mold base CAD system based on VB programming platform, and carries out mold design work for secondary development of SolidWorks API to improve the efficiency of mold design and reduce errors in the mold design process. 1 Design principle of the mold frame design system In the traditional mold design process, the user first analyzes and selects the plastic parts, calculates the working size of the mold, and then selects the model of the standard mold frame through complicated formula calculation and find related manuals, and designs a reasonable pouring. The system and the ejection system finally draw the assembly drawing and engineering drawing of the plastic mold according to the above design results. However, almost every process in the design process needs a lot of data query and calculation, and most of the processes rely on the designer's experience to design, so it is difficult to avoid the mistakes caused by human factors in the mold design process. . In order to solve these problems, the author deeply studied the principle and characteristics of the injection mold design, and designed a CAD system based on SolidWorks injection mold, that is, after the user got the plastic part forming work size, the user input the injection molding machine information and After forming the working size information, the system finds the mold frame that best meets the rule premise from the mold base library through the rules of the rule base. The design of the ejector system is carried out by manual assistance, and then the three-dimensional construction of the mold is carried out through the SolidWorks API driver. mold. It mainly consists of injection molding machine selection module, mold frame model selection module and manual auxiliary module. The process is shown in Figure 1. 2 system function implementation 2.1 Injection Molding Machine Model Selection Module Design The choice of injection molding machine model is one of the most important aspects of the entire mold design. It is related to the size of the injection molding, the length of the injection cycle and the quality of the injection molding. In the design process of the formwork system, since the size parameter of the positioning hole of the injection molding machine determines the outer diameter of the positioning ring, the nozzle hole diameter and the nozzle ball radius of the injection molding machine and the aperture and spherical radius of the sprue bush exist. A certain size relationship, so the function realized by this module is to display the relevant parameters of all the injection molding machine types in the database to the user, and then select the appropriate positioning ring and pouring according to the above calculation relationship through the injection molding machine selected by the user. The mouthpiece completes the selection of the matching parts of the gating system in the formwork, and assigns their relevant part sizes from the database to the array for invocation during SolidWorks modeling. 2. 2 design of the mold base selection module The main task of the module is to determine the model number of the mold base or the mold frame model directly selected by the user according to the model size of the mold input by the user, and query the parts and assembly of the mold base from the standard mold base database of the system. All dimensions of the ligand. The mold base database of this system, the author chooses the mold base of the national standard "small and small plastic injection mold frame and technical conditions" (GB/T12556. 1-90). In this standard, the designed size combination is nearly 5,000, but the determination of the national standard formwork type can be followed by certain procedural steps. The system uses desktop database Access to centrally manage these data, and builds a series of two-dimensional relation tables for various types of size series. Three tables and four parameters are used for the formwork: three tables are the model frame length parameter list. The mold frame width series parameter table and the fixed/moving template thickness parameter table, the four parameters are the mold frame width, the mold frame length, the fixed template thickness and the movable template thickness. The four parameter codes are used as the query keywords of the model index database to realize the mutual correlation between the data tables, and the consistency between the user selection and the system internal decision module to the system database access is solved. Therefore, the structure associated with these parameters uses a forward inference mechanism to select the appropriate standard formwork. The system starts from the job size information of the user box mold, and the inference engine obtains the operation rule that meets the rule premise in the operation rule base. Finally, the conclusion corresponding to the rule is executed, and the theoretical model frame parameter value is obtained. For the various standard formwork models stored in the database, their parameters are unlikely to satisfy all the theoretical data of the calculation. Therefore, when determining the model frame model, the system adopts the weighted closest neighboring method, that is, the importance of using theoretical data. As a keyword or index condition, each time the model with the corresponding parameter data of the standard mold base in the database is selected as the final selected model frame. 2. 3 design of manual auxiliary module Since the position of the push rod and push plate guide post of the ejector system needs to be determined according to the shape of the plastic part and the experience of the designer, and the push rod and the push plate guide post are inserted in the front push plate and push back during the opening and closing of the mold. Between the guide holes of the plate and the moving plate, only the consistency and overlap of the matching positions of the guide holes on the three parts are ensured, so that there is no series of consequences of flashing, position interference and scrapping of the entire mold. Therefore, in order to ensure the practicability and accuracy of the system, the system adopts the manual-assisted form of the guide hole position parameters of the input push rod and the push plate guide post, and the computer program is used to ensure each of the front push plate, the rear push plate and the movable plate. The consistency of the position of the guide hole position avoids design errors caused by human factors. Next page Cordless Leaf Blower,Backpack Leaf Blower,Electric Leaf Blower,Echo Leaf Blower Suzhou ZhaoCheng lithium technology Co., Ltd. , https://www.scans-tools.com