Software) generally does not have the dynamic simulation function of the actuator, and can not check the interference between the moving parts. Therefore, there is no substantial improvement in reducing product design errors, design changes and rework in the manufacturing process.
(2) The process planning and CAD design model are out of line. In the production process of the product, the traditional process specification is still widely used by the craftsman. All the process problems in the preparation process are determined by the process personnel. The advantages and disadvantages of the process are related to the experience of the process personnel, the thought method and the understanding of the 'best process process'. Therefore, different process personnel often appear to be the same part. Different processes are programmed, that is, the “consistency of the process†is not good. This is not conducive to the organization of production, but also to the type of machine tools, resulting in increased investment in equipment and increased manufacturing costs.
The above situation restricts the improvement of China's packaging machinery manufacturing automation level, and also widens the gap between China and Western industrialized countries. For example, a vertical bag forming a lapel-type former on a one-pack packaging machine, due to its special shape and structure, determines that it cannot be realized by conventional machining methods. Foreign general professional manufacturers use computer-aided mold design, automatically generate mold processing procedures, control high-precision CNC machine tools, process molding molds, and then stamp out the required molds from the molds. At present, most domestic manufacturers use manual production. Handmade, randomness is relatively large, even for the same person, using the same production method, the shape of the mold is different, and the scrap rate is quite high.
Therefore, changing the design and manufacturing mode with the above defects and exploring a new production mode that is economical and practical and suitable for the characteristics of the packaging machinery industry is an important issue for the majority of technicians.
2 Development Discussion At present, CAD research, development and promotion have started from 3D modeling, machine design, system design, intelligent design and virtual design, from CAD technology to CAE (Computer Aided Engineering), CAPP (Computer Auxiliary process design), CAM (Computer Aided Manufacturing), ERP (Enterprise Resource Planning) development. Since its establishment in 1987, China's 863 Program CIMS theme has been devoted to the research, development, and application of computer integrated manufacturing systems. So far, 150 demonstration enterprises have implemented CIMS projects nationwide. The practice of these enterprises provides valuable experience for Chinese enterprises, especially small and medium-sized enterprises, how to use integrated automation technology to modernize enterprises in combination with national conditions. However, the CIMS project is still in the discussion and demonstration stage, not the stage of large-scale promotion. The author believes that at this stage, for the actual situation of the packaging machinery industry, the development of low-cost practical local integration technology, that is, the integration technology of basic components has great practical significance. This is because: China's packaging machinery manufacturing industry is mostly for small and medium-sized enterprises, and there are widespread problems of insufficient funds, technology and manpower. If blindly pursuing a high degree of integration, it is not in line with objective reality.
Compared with other machines, the packaging machinery has a complicated structure and many parts. In addition to ordinary parts such as shafts, wheels, and sleeves, various special parts for realizing specific functions, such as bag forming parts and metering filling parts, are used. , heat sealing parts, variable pitch material supply parts, etc. These components play an important role in the packaging and are the basic components of the packaging machinery. The structure and performance of the components will directly affect the performance of the entire machine and the quality of the packaged products. If you first realize CAD/AMCAPP integration for such basic components, it will greatly improve product design and manufacturing quality and shorten the product development cycle.
The development of CAD application software for basic components has a certain foundation. The packaging machinery designers have done a lot of work in the development of software for CADS of such components, and solved the problems of design calculation and parametric drawing. On this basis, pay attention to summing up the experience, continue to carry out in-depth development research, add computer-aided process design module and computer-aided CNC machining module, and develop an application system integrating CAD, CAPP and CAM, namely the basic component CAD7CAPP/ The CAM integrated system is undoubtedly a shortcut with less investment and quick results.
The system consists of three sub-systems: CAD, CAPP and CAM. The functions and connections are as follows: CAD sub-system CAD sub-system can be established on the platform of existing commercial software. The system should have the structural selection of the basic components, optimize the calculation structure design, dynamic simulation, interference inspection, data analysis, modification design, graphics processing and other functions, and pass the geometric information and process information of the parts to the part design. CAPP subsystem.
The CAPP sub-system performs the process route decision and process design based on the part process information obtained from the CAD sub-system, and feeds back the process size information of each process part to the CAD system to generate the process drawing, which is the formation of the tool position file in the CAM link. Provide relevant data. The subsystem should have automatic generation of process specifications, powerful editing and modification functions.
The CAM sub-system extracts the tool path and process parameter information from the CAPP sub-system, and forms the tool position file through analysis and calculation and necessary post-processing. Finally, the NC machining program that can be identified by the specific machine tool is generated, and the NC machining simulation can be performed.
The link between product design and manufacturing plays a role in linking up and down. Whether it can be effectively integrated with CAD and CAM is the key to the success of the whole system. How to realize the processing information of extracting parts from CAD system is a difficult point in system design, and it is also a hot topic in the field of computer-aided manufacturing. In recent years, scholars at home and abroad have conducted in-depth and extensive research in this field, and have made great progress in both theoretical systems and practical applications. According to the current research results, there are several methods for obtaining process information from CAD systems: (1) acquisition from traditional 2D CAD graphics; (2) extraction from CAD files obtained from 3D modeling; (3) Perform a fully parametric design of the part features and extract them from the parameter table of the CAD system.
3 Conclusion The development of CAD/CAPP/CAM integrated system for packaging machinery basic components is a very meaningful work. The author believes that with the help of the current research results, the CADCAPP/CAM integrated system of economical and practical packaging machinery basic components will soon be put into practical use with the efforts of the majority of scientific and technical personnel.
Silicone Lamp,Kids Night Light,Colorful Silicone Lamp,Rechargeable Silicone Lamp
Yuyao Flylit Appliance Co.,Ltd , https://www.yyflylit.com