New ideas for improving the design method of packaging machinery 1 Introduction China's packaging machinery industry started in the 1970s and has developed rapidly in the late 1980s and 1990s. It has become one of the top 10 industries in the machinery industry. Both in terms of output and variety, it has made remarkable achievements and provided strong guarantee for the rapid development of China's packaging industry. At present, China has become one of the largest producers and consumers of packaging machinery in the world. Trendy Plus Size Jumpsuits,2 Piece Jumpsuit,Peplum Jumpsuit,Monsoon Jumpsuit Shaoxing hjh clothes.co.ltd , https://www.hjhclothes.com
Packaging machinery as a product, its meaning is not only the material meaning of the product itself, but includes the meaning of the form product, invisible product and extension product. Formal product refers to the specific form and basic function of the packaging machine itself; invisible product refers to the actual utility provided by the packaging machine to the user; extended product refers to the packaging machine's quality assurance, usage guidance and after-sales service. Therefore, the packaging machine design should include: market research, schematic design, structural design, construction drawing design, instruction manual preparation and after-sales service plan. 2 The present situation of packaging machinery design in China The categories of packaging machinery design mainly include mapping imitation design, development design, improved design, and serialized design. For example, the beer filling production line has a production capacity of 1.6 to 40,000 bottles/h, of which the number of filler valves for filling machines ranges from 48, 60, 90 to 120, which are serialized designs.
The design from the ordinary beer filling line to the draft beer filling line belongs to the improvement and development design. For packaging machines operating at low to medium speeds, we can basically do our own design. The high-speed packaging machines, especially some advanced models, are mostly similar models for mapping and imitation of foreign models, and are designed for localization and serialization. The main reasons are: (1) Most designers have not really mastered advanced design methods, such as dynamic design theory and methods of high-speed packaging machinery, and they cannot simulate the dynamic accuracy of the mechanism under high-speed working conditions. (2) The combination of production, learning, and research is not tight enough, and theoretical research results cannot be used in real-time design in a timely manner. Designers lack timely technical training; (3) The entire industry lacks the strength of macro-control, and the superior resources cannot Get reasonable configuration and adjustment.
In the field of packaging machinery design, the vast majority of designers still use the previous design methods: (1) According to the design task book to find similar models as a prototype; (2) Reference prototype to develop various technical performance indicators and scope of use; (3) Design working principle diagram, transmission system diagram; (4) design key parts, components; (5) design assembly plan plan and action cycle diagram; (6) design parts plan, assembly drawing and parts drawing; (7) for main parts The key parts are checked for strength and stiffness; (8) Design control schematics, construction drawings, etc.
Nowadays, some domestic universities' design software can perform finite element analysis and optimization design for common mechanisms in packaging machines. The CAD/CAM software developed by the cam link mechanism has been able to meet the company's ability to independently design cam linking mechanisms. Application in the actual packaging machinery design is not yet common.
New packaging machinery is often a machine, electricity, gas integration equipment. Taking full advantage of the latest achievements in information products and adopting separate transmission technologies such as pneumatic actuators and servo motor drives, the drive trains of the entire machine can be greatly shortened, the structure is greatly simplified, and the work accuracy and speed are greatly improved. One of the key technologies is the use of multi-motor drag synchronization control technology. In fact, it is not difficult to master this technology, but some designers do not understand this trend of packaging machinery. If we say that China's packaging machinery design was an imitation and learning stage, we should now have a sense of innovative design. 3 New trends in the design of packaging machinery in Germany Germany and the United States, Japan, and Italy are the world's largest packaging machinery players. In the packaging machinery design, manufacturing, technical performance and other areas in the leading position. The design of German packaging machinery is based on the results of market research and market analysis. The goal is to work hard for customers, especially for large companies. In order to meet customer requirements, German packaging machinery manufacturers and design departments have taken many measures: (1) The degree of automation of the process is getting higher and higher to increase productivity and flexibility and flexibility of the equipment. Use robots to perform complex actions. During operation, under the computer-controlled camera recording information and monitoring, the robotic manipulator will complete the specified actions according to computer instructions to ensure the quality of the package. (2) Improve production efficiency, reduce production costs, and maximize production requirements. German packaging machinery is famous for its beverage, beer filling machinery and food packaging machinery. It has high speed, complete sets, high degree of automation and good reliability. Its beverage filling speed is up to 120,000 bottles/h and the pouch packaging machine has a packaging speed of up to 900 bags/min. (3) Integrate product machinery and packaging machinery. Many products require direct packaging after production to increase production efficiency. For example, chocolate production and packaging equipment produced in Germany is controlled by a system. The key to the integration of the two is to solve the problem of good matching of production capabilities. (4) Adapt to changes in production, with good flexibility and flexibility. Due to fierce competition in the market, the cycle of product replacement is getting shorter and shorter. For example, if cosmetic production changes for three years or even changes in one quarter, the production volume will be very large. Therefore, it is required that the packaging machinery has good flexibility and flexibility, so that the life of the packaging machine is much longer than the life cycle of the product, so as to meet the economical requirements. The request. (5) Universal use of computer simulation design techniques. With the rapid development of new product development, German packaging machinery design generally adopts computer simulation design technology, which greatly shortens the development and design cycle of packaging machinery.
Packaging machinery design should not only pay attention to its capabilities and efficiency, but also pay attention to its economy. The so-called economy is not exactly the cost of the machinery and equipment itself, but more importantly, the operating cost, because equipment depreciation costs only 6% to 8% of the cost, and the rest is the operating cost. 4 The idea of ​​improvement of packaging machine design method First, in the design concept, we must learn from the experience of advanced countries, take the user's needs as the design goal, and combine the concept of flexible design, modular design, a machine with multiple, or replace a small amount of zero, Parts can perform different functions or meet different product requirements.
With the development of science and technology and the intensification of market competition, the needs of customers are also getting higher and higher. This demand is reflected in the following aspects: First, to increase production efficiency to meet the needs of delivery and reduce the cost of production, for some products, also requires the convergence of packaging machinery and production machinery; second is to adapt to product updates and changes Needs, packaging machinery should have high flexibility and flexibility; Third, when the equipment fails, it requires remote diagnostic services; Fourth, is conducive to environmental protection, noise, dust and less waste; Fifth, equipment investment as little as possible The price should be as low as possible. Therefore, on the basis of market research, we must fully understand and carefully analyze the needs of users, determine the functions and technical indicators that the packaging machine should perform, and formulate preliminary design plans.
The modern packaging machine design process should include: market research, user needs analysis, packaging machine function determination, feasibility demonstration, formulation of design options, user benefit analysis, feasibility demonstration of the program, schematic design, structural design, construction drawing design , prototype production (virtual manufacturing), technical verification and modification of construction drawings, preparation of after-sales service plans and remote diagnosis programs, improved design, serialized design, etc. Market research is the basis of all packaging machine design. Without market research, all the design work we do may be equal to zero. Market research can be based on policy guidance, industry supply and demand information, expert analysis, industry exhibitions, technical exchanges and other clues to find the user's needs information, and after finishing analysis, determine the packaging machine should complete the function.
In the design of the principle scheme, we must first fully understand the functions of the relevant information products and electronic products, understand the performance of pneumatic components, and simplify the mechanical transmission system. We can also use multi-motor drag to shorten the mechanical transmission chain. For the indispensable mechanical transmission system, modern design means should be used as far as possible, and on the basis of the analysis of the product's functions, the best design scheme should be obtained through innovative ideas, system modeling, dynamic analysis, and dynamic optimization.
Technical design is to structure the principle design, determine the number, shape, size, and material of the components, and perform dynamic calculation, power calculation, strength calculation, and stiffness calculation for the key parts of the main components.
In the overall design, it is necessary to fully consider the layout of the entire packaging machine system, coordination of movement, design, human-machine environment, and packing and transportation. Modular design is an advanced design method. Its core idea is to divide the system into several modules according to its functions. The same functional unit in the packaging machine is designed to have different performance and interchangeable modules, and different combinations of modules are adopted. , Make packaging machine multi-functional, serialization. The advantages of using this method are: (1) Speed ​​up the replacement of packaging machines. Because of the replacement of new models, it is often a partial improvement. The introduction of advanced technology into the corresponding modules makes it easier to achieve local improvements; (2) shorten the design cycle. When the user requests, only need to replace the module, or design and manufacture part of the module, you can get a new model to meet user needs; (3) reduce costs and facilitate maintenance; (4) stable and reliable performance. Because the module design, the packaging machine function division and module design, carried out a careful study to ensure the performance of the module, such as: cam mechanism, servo mechanism, detection system, transmission system, control system, measuring mechanism, cutting mechanism Wait.
In addition, the industrial standards for serialization and modularization of packaging machinery also reached the time of the formulation. Packaging machinery has become one of the top ten machinery industries in China, and the development of serialized and modularized industry standards will surely promote the development of the packaging machinery industry in China. Take a new step.
With the development of virtual concepts, the simultaneous development of electronic technology, computer-aided design (CAD), three-dimensional graphic design (3D) and computer simulation design, a new technology is adopted in the design-virtual design and virtual manufacturing. The machine element data is stored in the computer. After the drawings are digitized and input into the computer, the computer can automatically become a three-dimensional model. Then input the actual production data and indicators, and input all kinds of possible faults into it. The computer three-dimensional model can be modeled on the actual working conditions to demonstrate the production capacity that can be achieved, the quantity of waste products, and the matching of each link of the production line. Situation, production bottleneck, etc., and the model can be modified according to the customer's opinion, and it can operate quickly until the customer and designer are satisfied.
Modern packaging machine design should meet the "green design", that is, the requirements of humanized design. It is a comprehensive design for quality design, assembly design, manufacturing design, maintenance design, and reliability design. China has a large population and its per capita consumption level is lower than that of developed countries, and there is a big difference between urban and rural areas. The design of packaging systems should be based on low prices and high quality, and we must not blindly pursue high precision. We must consider factors such as reliability, safety, environmental protection, and low noise. Fully embody principle optimization, structure optimization, manufacturing optimization, and shape optimization.
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