托架沖壓工藝分析及其模具設(shè)計(jì)【全套含CAD圖紙、說(shuō)明書】

托架沖壓工藝分析及其模具設(shè)計(jì)【全套含CAD圖紙、說(shuō)明書】,全套含CAD圖紙、說(shuō)明書,托架,沖壓,工藝,分析,及其,模具設(shè)計(jì),全套,CAD,圖紙,說(shuō)明書 編號(hào)： 畢業(yè)設(shè)計(jì)(論文)外文翻譯 （原文） 學(xué) 院： 機(jī)電工程學(xué)院 專 業(yè)：機(jī)械設(shè)計(jì)制造及其自動(dòng)化 學(xué)生姓名： 盧盛釗 學(xué) 號(hào)： 1200110416 指導(dǎo)教師單位： 機(jī)電工程學(xué)院 姓 名： 楊曉清 職 稱： 講師 2016年6月3日 第 19 頁(yè) 共 19 頁(yè) 桂林電子科技大學(xué)畢業(yè)設(shè)計(jì)（論文）報(bào)告紙 Stamping die industry development present situation and theanalysis Mold industry is the foundation of the national economy; it is recognized as the key industry in the world; and it is also regarded as "the mother of the industry" in the developed countries. Molding has many advantages, such as high efficiency, good quality, economizing on raw materials, reducing the cost of the production. Manufacturing the components of the productions by molding now has become an important technological method in the industry. In the machinery, electronics, light industry, textile, aviation, aerospace and other industrial areas, molding has become the most widely used main technical equipment of the industrialized production, which undertakes the processing and production task of 60% - 80% of the product components, elements and parts in these industrial fields. The concepts that "Mold is the product quality" and "Mold is the economic-effect" have been realized and received by more and more people. In China, people have recognized the important foundation of the molding in the manufacturing industry and they have realized that the management of the crisis and the market competiveness of the enterprises depend on the speed of replacement, new product development capabilities. Currently the tradition of manufacturing the engine hood by the thin steel plates will still be last quite some time, so it is necessary to analysis the technological properties, such as the reasonable structure, the force, whether it is easy to break out the surface, on the basis of the steel plate by computer software, to find the shortcomings of the ready components, discuss and determine the improvement of these deficiencies and thus improve the mold design and the stamping method, and to realize eventually the product improvement on the mechanical properties, appearance, the results of the usage and the cost and so on. Stamping processing is achieved by the mold. From the point of mold, the level of mold production technology has become the important symbol of measuring that of the country's manufacturing, because on a large extent the mold determines the capability of product quality, effectiveness and new product development. People have known that "mold industry is the basis processes and equipment of the industrial production". According to the statistics, in the products of electronics, automobile, electrical machinery, electrical appliances, instruments, meters, home appliances and communications, 60% ~ 80% of the parts are shaped by the molds. The characteristics of high-precision, high-complexity, high-consistency, high-productivity and low-consumption, which are acquired by the mold production, are incomparable with the other manufacturing methods. In addiction, the stamping process can create great added value. The mold is "the amplifier of the value"; the value of the final production made by the mold is often higher than that of the own mold dozens, or even hundreds. Nowadays, the value of the global mold annual outputting is about 60 billion U.S. dollars, and the output value of the mold industry has surpassed that of the machine tool industry in Japan, the United States and the other industrialized countries. Since 1997, China's output value of the mold industry has also exceeded that of the machine tool industry. Among all the molds (forging mold, die casting mold, injection mold, etc.), no matter the quantity, weight or the value of the stamping die is on the top one. Thus, sheet metal stamping and processing and the mold production technology have made and will continue make a great contribution to the development of the national economy. With the development of China’s economy, the needs to the technology development and the technical professionals will be rising. Therefore, it is significantly important to strength the research of sheet metal stamping and processing and the mold production technology. Current Situation and Development Trends After the 100 years’ development, it has already been mature that the design technology of the engine of the hood of the small-size vehicle. However, with the exploitation of the all kinds of small sized engine, a lot of improvements have been done on the front and the rear hood of the engines. In the current period, the improvements of the hood of the small-size automobile’s engine are mainly manifested in the improvement of the construction materials, for example, replace the traditional thin steel plate with the resin-based composite materials and make with the engine water tank, the heat shield and the engine cover, etc. by RTM. As with composite materials replace the original metal shell type of engine parts, the weight will be reduced, and the cost will be greatly reduced; for manufacturers, this creates a great deal of profit, so the technical progress is also will continue for a long period of time. As far as it goes, there are still many problems in the China’s stamping die, and among these problems, the mold production cycle, quality and quantity are still the keys. Compared to the international standards, in general, the productive cycle of China’s stamping die is longer, the lifespan is shorter twice and there is a wide gap of the accuracy. The lack of quantity is mainly reflected on the large-scale, sophisticated, complex, long-life mold. The main reasons of these problems are the following: 1) the irrational industry structure (such as enterprise organizational structure, product structure, technical structure and import and export structure, etc.) 2) the weakness of the comprehensive character of the enterprise, the level of design and production, the ability of development and the management; 3) the serious shortage of the qualified personnel; 4) the shortage of the capital; 5) the low level of the specialization, standardization and commercialization and the bad collaboration: 6) the outmoded mold materials and related skill; 7) the low efficiency and benefits of the mold manufacturing enterprises, etc.. The stamping dies used by Tian Long Machinery Company Ltd., Liuzhou still relatively fall behind, so the components made by the stamping dies are with the shortcomings that they are of low quality, low accuracy of the size and shape and short lifespan, and they often wrinkle. Additionally, the irrational nesting may lead to the waste of raw materials. The reasons above are mainly due to the unreasonable mold design and the incomplete consideration. What’s more, the unreasonable process design is the reason of the low quality of the components. Process design is the bridge and link between the production design and manufacture. Reasonable forming process design is the basis of mold design and manufacture, and it is also the key that whether the component can form smoothly; it is related directly to the quality, cost, efficiency of the production, and the mold’s lifespan and so on. In the present era, the technology developing rapidly, the technology of mold design is also in the fast developing. The tendency of the mold technology in the future is the development towards the information technology, high-speed production and precision of the development. Nowadays, competition is very intense in the market economy. In order to prevail in the market, the level of the design must be continually improved so that the stamping dies are more reasonable and the quality, size, shape accuracy, lifespan and resource utilization of the components are can be greatly enhanced, which can improve the company's efficiency and competitiveness. The Research Results of the of Metal Forming Technology and Research Results in Recent Years In recent years, stamping forming process there are many new advances, especially in precision stamping, precision molding, precision cutting, composite materials, forming, super plastic forming, soft-casting and the electromagnetic forming of new technology with each passing day, increasing the accuracy of precision stamping parts productivity is also greatly improved, is to improve the stamping process to high-quality, new level of development. Since CAE is introduced, the stamping process has developed to computer simulation and analysis process from making finite element analysis by the pairs of stress and strain in order to achieve optimal design. What’s more, the computer-aided design has also been launched in the stamping blank design to draw on the blank layout to optimize the design. The research on the performance of the metal stamping and forming and the limits of forming, as well as the determination on the difficulty of the stampings forming and the developing on the techniques of forming forecasting, shows that the stamping and forming begins to enter the scientific stage guided by the stamping theory from the stage of analyzing the original experience and experiments; these all help the technology of stamping and forming go to the development of stamping and intelligent computer-aided engineering. Gap between the Domestic and Foreign Mold At present, the characteristics of China's industrial production are production variety, quick updates, and the fierce market competition. In this case, the requirements of the users for mold manufacturing are "the short delivery time", "high precision", "good quality", and "low prices". That the supply and demand are both booming is the general display of China’s mold market in recent years, and in 2004 this pattern remains. As the growth rate of the automotive, mechanical and electrical industries drops, the price of the raw material rises, the energy and the electricity is in the shortage, the capital is not enough to go round and the transportation expense is on the rise, in 2004 the growth rate of the mold market falls back, although the supply and demand condition is flourishing. The condition in 2005 is expected to be down 5 percentage points compared to 2004. In Europe and the United States, CAD / CAE / CAM have become a widely used technology in the mold enterprise. Presently the mature level of the 3D design of CAD has reached 70% ~ 89%, and Australian 3D design 60%, while China is only just on the beginning. The Application of CAE technology in Europe and the United States has been mature. In China, only few enterprises put CAE technology which can simulate of metal deformation process, analyze the distribution of stress and strain to predict rupture, forecast the defects such as cracking, wrinkling and springback in the use during the stamping die design. In the DL Chart (stamping process diagram) design process, the stamping process analysis, the choosing of the direction of stamping and the division of the processes are close to those of foreign countries. However, there is a wide gap on the design of the additional surface in process and product processing, for example, the foreign technology has the rich experience on the design of the drawing off part and the digital-analog process, especially there is a wide disparity between the home and the domestic on the process of the high-precision car components. The high-speed cutting is a processing skill by using the high cutting speed, high feed rate and high processing quality. In foreign countries, it has been a relatively mature technology, the contour machining precision ≤ 0.05mm, which does not need to study co-gap. Machining processing makes sure the trimming die cutting edge clearance; pliers installation do not need the spotting time, so that it can be directly loaded with mold after processing. However, in China,mold fitter’s workload is still large. Although the performance of the domestic machine is quite equal to that of the equipment abroad, on the sector of the technological data of NC, the gap is still existed on the feeding path, method and the design. In addition, the disparity is showed on the mold manufacturing cycle, the quality and the level of standardization. Chapter II Stamping Process Project The pros and cons of the process of stamping, determines the rationality of the stamping parts manufacturing technology, stamping parts quality and the cost of production, so stamping parts must be analyzed thoroughly, which includes the analysis on the structure, performance and the difficulty level of the stamping parts, to determine the scientific and rational processes program. And to ensure the product design requirements, minimize the process, we could adopt the appropriate materials, save the materials, select the advanced and reasonable processing technology, and strive to the simple production process to reduce the production costs and improve the economic efficiency. Mold CAE technology is the one which simulates the real process of the stamping die forming on the computer before the design and manufacture of molds, informs the user that whether the die structure design and the process conditions are reasonable and ultimately provides users with the best mold design process program. The reliability of this technology is more than 80%. By using the technology the design and manufacturing cycle can be reduced by 2 / 5 (for complex mold case) and improve the mold quality and product qualification rate which can significantly reduce the manufacturing cost and enhance the product market competition. With the needs of the modern manufacturing, the invitation and design of the new production, the quality and the cycle have become the key that whether the business can survive and develop in the market economy. By the help of the promotion and application of computer-aided design (CAD) and manufacturing technology (CAM), not only the designers will be free from the heavy and complicated hand drawing method, but also it is a revolutionary huge leap to the manufacture. But before the introduction and the application of the concept of CE (Concurrent Engineering), the CAD / CAM / CAE / CAPP of the production belong to different departments, and the product design, manufacture and analysis are completed in the serial design from the head to the feet. Obviously, for the concurrent design, the former can not be updated on the time throughout the design process so that it is difficult to achieve the synchronous implementation of the production’s invitation, fabrication and integration and extend the development cycle and the production costs. The "National 863/CIMS theme", major application concurrent engineering projects, completed by the company reflects a promising application prospects by the implementation of the projects in the new product invitation through CAD / CAM / CAE. And, the parallel full-stamping die parameters design made by the PRO / E 3D design system in the product development process has been in a very good application. In recent years, with the rapid development of the computer comprehensive technology, Computer Integrated Manufacturing System (CIMS), Concurrent Engineering (CE), Virtual Manufacturing (VM) and a series of the other new technologies bring the mechanical engineering industry into a new production process mode. Some statistics show that the related businesses have received significant economic and social benefits when China applies and popularizes 863/CIMS; the enterprises have made a great improvement on rising production efficiency, reducing the costs, shortening product cycles and enhancing the quality. In terms of its meaning, "Concurrent Engineering" is a complex systematic process, which addresses the problems that how to develop and design effectively a product and to organize rationally the process preparation, manufacturing, process management, business and sales process to achieve the best product cycle and the lowest cost. During these years, the launch and implementation of the parallel project in the company are still in the exploration with the collaboration in different departments. However, the stamping die concurrent design has been basically formed into a relatively complete process framework; in the mold design and manufacturing process, the fundamental realization of the design must be realized on the support of the core CAD / CAM / CAE software, and the company introduced the PRO / ENGINEER of the U.S. PTC's as the CAD / CAM software platform which is the platform of the concurrent engineering design system. Before and in the process of the design process, the key of the die structure design is to mold by PRO / E and forming the numerical simulation is the introduction of Professional CAE analysis system DYNAFORM, in the mold before and begin, for the of the key elements of intent to use model, to calculate and analyze standard data which is put forward to DYNAFORM and to predict the feasibility of interventions, which can improve die structure parameters. What’s more, the manufacture of molds can achieve the seamless switching of the CAD / CAM in the PR0 / E, which can not only fully reflect the mold design intention and avoid the loss of information in the engineering drawings, but also can significantly shorten the manufacturing cycle. PRO / ENGINEER can use the design process parameter settings, relations, reference management to realize the total dependency parametric design, in other words, in the mold design process, any change of the production in the design will be reflected to all of the relevant structural parts and the design will be updated automatically in accordance with structural design. It greatly improves the efficiency of die design, supports the repeatability of the design, and updates the design with the high efficiency. PRo / ENGINEER provides a set of methods and makes up a relatively complete the environment of Top-Down Design, which refers to an organizational approach in the structural design, with the other kinds of tools. Actually, in the past, the hand and two-dimensional design process reflect the its purposes, as well as under the environment of PRo / E. Around the core theme of the design Top-Down Design commences correlation design. The realization of die concurrent engineering is completed by the following six steps in general: (1) Participate in the process of extraction of the model elements in the product or prototype product, and accept or self-complete the final product which already has all the characteristics of the model. (2) Analyze to the process of the product, and determine the important structural parts of the die that is hierarchy skeletons organizational design process by Top-Down De-sign means. (3) Establish the core component model in the Pro / E system by stamping and processing around the product; identify structural parameters according to the process need and analyze and calculate the reliability by the analysis software DYN after converse the data format to submit stamping CAE. (4) Make the die design in the Pro / E system. As to accept the change from the design department and to update the design of the interventions on the results of the analysis at any time, the reliability of the model is effectively ensured by building the modeling structure, order, light control, the relationship among features, the relationship among components, and the relationship among the parts, such as when the production changes locally, the corresponding punch and die, positioning components, fixed plate, the upper and lower structural characteristics of the template are needed to ensure the regeneration successively. (5) Output the two-dimensional drawings after the die structure design is completed. According to the engineering drawings and the w