In life, the relationship between reports and us is getting closer and closer, so we should pay attention to the format of reports when writing. So what kind of report is effective? The following is a model essay on the opening thesis of mechanical major compiled by me. Welcome to reading. I hope you will like it.
Opening Report of Graduation Thesis of Mechanical Specialty 1 Thesis Title:
Opening report on graduation design of robot-free tool changer in machining center
The research content of this topic
The purpose of this paper is to develop and design a small vertical machining center with small volume, compact structure, low price and short production cycle. Mainly complete the following work:
1. Investigate a machining center to find out its tool changing device and structure without manipulator.
2. According to the machining center studied, the overall layout design of tool magazine is carried out. Draw the general layout of the machine tool and the general assembly drawing of the tool magazine. There must be a scheme analysis, and the existing machine tools cannot be copied.
3. Design important parts of tool magazine, such as indexing mechanism of tool magazine (including positioning device and tool clamping device, etc.). ), and draw the assembly drawing of this part and the working drawing of more than three main parts (such as shell, worm wheel and worm).
4. Write a design specification.
The implementation plan and timetable of this study.
The research methods used in this topic are as follows:
(1) theoretical analysis, referring to the investigated machining center, the overall layout design of the tool magazine is carried out.
Timetable:
March 20091June-March 20, 2009 to collect relevant graduation design materials.
The opening report was completed from March 23rd to March 27th, 2009.
March 30-April 2009 17 Graduation design scheme formulation, design and calculation.
The tool magazine design was completed on April 20-May, 2009 15.
May 200918-May 29, 2009, graduation design instructions were completed.
2009.6.0 1-6.08 graduation design defense.
Main references
Lian, Zhang Yonghong. Design and Application of Machining Center [M]. Beijing: Machinery Industry Press, 1995.3
Hui Yanbo, Sha Jie. Cnc programming and operation Technology of Machining Center [M]. Beijing: Machinery Industry Press 2008+02.
[3] Li Deying. Development trend of machining center [J]. Rolling stock technology,1994,6
Xu Zhengping. Comments on CIMT200 1 Machining Center [J]. Manufacturing Technology and Machine Tools, 200 1, 6.
Liu Li. FPC-20VT Vertical Machining Center [J]. Mechanical Manufacturing,1994,7
Li Hong. Practical machine tool design manual [M]. Shenyang: Liaoning Science and Technology Press, 1999.6438+0.
Liu Vietnam. Mechanical system design [M]. Beijing: Machinery Industry Press, 1998.8
[8] Panasonic MINASA series AC servo motor driver instruction manual
Cheng daxian. Handbook of Mechanical Design, 4th Edition, Volume 2 [M]. Beijing: Chemical Industry Press, 200 1. 1 1.
[10] process. Manual of Mechanical Design, 4th Edition, Volume 3 [M]. Beijing: Chemical Industry Press, 200 1. 1 1.
The background and research significance of the topic selection of graduation thesis opening report 2 1 for mechanical specialty.
1. 1 Research background of the project
There is friction between the moving parts and the stationary guide rail in the moving machining of CNC machine tools, which increases the power loss of the driving parts, reduces the movement accuracy and service life, increases the movement noise and heat, and may even deform the precision parts, which limits the improvement of the control accuracy of machine tools. Because there is a nonlinear relationship between friction and motion speed, especially in the case of low-speed micro-feed, this nonlinear relationship is difficult to grasp, which may lead to the so-called inchworm motion mode or chaotic limit cycle phenomenon, which seriously undermines the feed performance requirements of micro-feed, high precision and high response ability. Therefore, eliminating or reducing the adverse effects of friction is one of the efforts to improve the technical level of machine tools. In this paper, it is proposed that magnetic levitation technology can be applied to NC machine tool processing, which can eliminate the friction between moving parts and stationary guide rail and its adverse effects. It is of great significance to improve the level of China's machine tool industry and catch up with the international advanced level, and has broad social application prospects.
The significance of 1.2 project research
Machine tools are developing towards high speed, high precision and high automation. However, in high-speed cutting and high-speed grinding, due to the influence of friction and wear, the life of traditional rolling bearings is generally short, and magnetic bearings can overcome this deficiency. The outstanding advantages of magnetic bearings such as high speed, high precision and long life will gradually lead the electromechanical industry to a new realm of no friction, no loss and no speed limit. Ultra-high-speed cutting is an advanced manufacturing technology to process parts at a speed much higher than the ordinary cutting speed. Its characteristics are high machining speed, high machining accuracy and high production efficiency. Magnetic bearing is applied to ultra-high speed spindle system because of its outstanding advantages such as high speed, no wear, no lubrication, good reliability and adjustable dynamic characteristics. In order to realize high-speed cutting, many key technologies must be solved, the most important of which is the high-speed cutting spindle system, and it is very important to choose a reasonable bearing type to realize its high speed. Among them, magnetic bearing is one of the most ideal supporting types for high-speed cutting spindle. Magnetic bearing can meet the performance requirements of ultra-high speed cutting technology for ultra-high speed spindle. But its essential difference from ordinary sliding or rolling bearings is that the open-loop system is unstable and needs active control, which makes magnetic bearings have the advantage of controllable dynamic characteristics. Magnetic bearing is a complex product of mechatronics, and it is quite difficult to analyze and study it accurately. If it is verified by experiments, it will encounter difficulties such as high cost and long cycle. At present, foreign experimental research methods cannot be adopted, and the research is mainly carried out theoretically. It is necessary to simulate the magnetic levitation control system with computer software. This is the research purpose and significance of this topic.
2. Research status of this topic at home and abroad
The application and development of magnetic bearing can be said to be the revolution of traditional bearing technology. Due to the two remarkable advantages of no mechanical contact and active control, active magnetic bearing technology has attracted people's attention from the beginning. The research of magnetic bearing can be traced back to 1937. Holmes and Beams realized the suspension of steel ball by AC resonant circuit. Since 1988, an international conference on magnetic bearings has been held every two years to exchange and discuss the latest research results in this field. 1990 Swiss federal institute of technology put forward the research problem of flexible rotor, and in the same year Professor G.Schweitzer put forward the digital control problem; 1998, R.Vuillemin and B.Aeschlimann of Swiss Federal Institute of Technology proposed sensorless magnetic bearings. In recent ten years, the performance index of electromagnetic bearings developed by Switzerland, the United States, Japan and other countries has been very high, and they have been successfully applied to rotating machinery such as turbine machinery, centrifuges, vacuum pumps and machine tool spindles. Electromagnetic bearing technology is also widely used in aerospace, computer manufacturing, medical care and electron beam lithography. Looking at the 10 international symposium on magnetic bearings held in Lausanne and Turin in 2006, the main application research of magnetic bearings is in high-speed engines, high-temperature nuclear reactors (HTR- 10GT), artificial hearts and gyroscopes. The research on magnetic bearing technology in China started late, and the research on magnetic bearing began in the early 1980s.
1983, Shanghai Micro-Motor Research Institute developed the first fully suspended magnetic bearing prototype in China by using radial passive and axial active hybrid magnetic levitation. 1988, Chen Yixin of Harbin Institute of Technology put forward the theory and method of structural optimization design of magnetic bearing, and established the mathematical model of spindle control system of active magnetic bearing machine tool. This is the first systematic study on the structure and control of the spindle of active magnetic bearing full suspension machine tool. 1998, Shanghai university developed a magnetic bearing controller (600W) for the control of 150m oxygen turboexpander; In 2000, Tsinghua University cooperated with Wuxi Open Source Machine Tool Group Co., Ltd. to realize the factory application experiment of magnetic bearing motorized spindle of internal grinder. At present, Tsinghua University, Xi Jiaotong University, National University of Defense Technology, Harbin Institute of Technology, Nanjing University of Aeronautics and Astronautics are all developing research on magnetic bearing. In 2002, Tsinghua University Zhu Runsheng and others carried out a grinding test on the spindle of active magnetic bearing. When the rotating speed is 60 000 r/min and the normal grinding force is about 100N, the precision is less than 8m, and the precision grinding efficiency basically reaches the industrial application level. In June 2003, the performance index of magnetic suspension dryer developed by Nanjing University of Aeronautics and Astronautics Institute of Magnetic Suspension Application Technology passed the technical appraisal in Jiangsu Province, which took a gratifying step towards industrial application. In 2005, the spindle equipment of magnetic bearing developed by "Jinan Maglev Engineering Technology Research Center" was ground in Jinan No.4 Machine Tool Plant, and an inner circular hole workpiece was successfully ground, which is the first workpiece machined by magnetic bearing spindle in China. This technology fills the gap in China. In recent years, due to the development of microelectronics technology, signal processing technology and modern control theory, the research of magnetic bearings has also made great progress.
Generally speaking, magnetic bearing technology is developing in the following directions:
The theoretical analysis of (1) pays more attention to the rotor dynamics analysis of the system, and uses more nonlinear theories to analyze active and passive systems.
The equilibrium point and stability of magnetic suspension rotor system are analyzed. Pay attention to the establishment of nonlinear coupling model of the system to obtain better performance.
(2) Pay attention to the overall optimization design of the system, and constantly improve its reliability and economy, so as to obtain a broader application prospect of magnetic bearings.
(3) Digital control is increasingly used to realize controllers. In order to achieve higher performance requirements, digitalization, intelligence and integration of the controller have become an inevitable development trend. Due to the flexibility of digital controller, various control algorithms of modern control theory have been tried on magnetic bearing.
(4) A variety of new magnetic bearings have been developed, such as sensorless magnetic bearings, bearingless motor superconducting magnetic bearings and high temperature magnetic bearings. In addition, the spindle of magnetic levitation machine tool also has great development space in various aspects, such as: introducing high clean steel Z steel and EP steel; Ceramic rolling element, 40% lighter than steel ball; With the development of lubrication technology, oil and oil mist lubrication can effectively prevent cutting fluid from entering the spindle for high-speed cutting fluid; With the development of cage, polymer cage has the characteristics of light weight, self-lubrication and low friction coefficient. From the application point of view, the potential of magnetic bearings has not been tapped, and it has not reached the level of replacing other bearings. The design theory and control method need to be studied and solved.
3. The research objective and content of the subject.
3. 1 research objectives
Controller is the core of active control of magnetic bearing, and correct selection of control scheme and controller parameters is the premise for magnetic bearing to work normally and exert its excellent performance. This paper mainly studies the single-degree-of-freedom magnetic levitation system, which has simple structure, relatively easy performance evaluation and short research period, and can be extended to the research of multi-degree-of-freedom magnetic levitation system. Aiming at the nonlinear and control characteristics of magnetic suspension spindle system, this topic explores an effective control strategy to improve the overall performance and dynamic stability of the system.
3.2 Main research contents
(1) expounds the research background and significance of the subject, and summarizes the research status of related fields at home and abroad.
(2) The dynamic model of spindle of magnetic levitation machine tool is analyzed, and it is digitized, discretized, decoupled and reduced, which is the follow-up research.
3 1, the purpose and significance of graduation thesis of mechanical major (including analysis of research status at home and abroad)
My graduation project is "walking parts and overall design of billet numbering machine". I worked hard with one of my classmates (his project is "design of numbering parts of billet numbering machine") and completed the design of billet numbering machine. Our aim is to design a billet number spraying machine with relatively low price and reliable working performance, instead of manually writing numbers on billets.
Blank number spraying is an essential link in iron and steel manufacturing industry, in order to realize quality management and quality tracking. We write the number of continuous casting machine, heat number, heat number, flow number and time number indicating the production time of billet together to form a unique number of each billet, which is written on the surface of billet appropriately. In this way, if the quality of the billet is found to be defective in the subsequent inspection of the steel plant or the customer's use, we can trace back the important information such as the continuous casting machine, furnace seat, furnace number, process sequence and time that produced this billet according to this number, and find and solve the problems existing in the production equipment as soon as possible.
At present, some developed countries such as Japan and the United States have realized the automatic numbering of billets. Although there are many auxiliary equipment and the price is more expensive, it greatly improves the automation process and efficiency of production. High equipment utilization rate, high position accuracy and good controllability. In China, except for a few large steel enterprises (Baosteel, Angang, etc. Although the automatic billet numbering machine has been introduced, most iron and steel enterprises are still in the stage of manual numbering.
Realizing the mechanization and automation of billet spray number is one of the important ways to improve production efficiency and reduce production cost. Billet numbering machine will have a great market at home and abroad. On the one hand, the manual process not only wastes a lot of energy, but also interrupts the automation process of production, thus reducing the production efficiency and increasing the production cost. On the other hand, due to the high temperature, strong thermal radiation and a large amount of water vapor and dust in the workshop where steel billets are produced, the manual numbering workers have great labor intensity, which is a kind of damage to their health and easy to get occupational diseases. Therefore, no matter from that aspect, there is an urgent need for a billet numbering machine with relatively cheap price and reliable working performance to replace manual numbering.
As a college student, graduation project is an opportunity for me to show my four-year study results, and it is also a test of my comprehensive ability. I am also very interested in the topic of "walking parts and overall design of billet spraying machine", and I will try my best to complete this graduation design. Generally speaking, the billet number spraying machine is of practical significance to the steel plant and my graduation project.
2, the basic content and technical scheme
This topic is based on the combination of mechanical design and electronic control technology to design the billet number spraying machine. After continuous rolling, the billet size is 160mmx200mm square billet, which is cut into fixed length by cutting machine and sent out by 300mm wide output channel.
1. Basic content
Firstly, the overall scheme of billet numbering machine is drawn up, then the transmission scheme and structural parameters of walking parts of billet numbering machine are determined, and finally the assembly drawing and parts drawing of walking parts of billet numbering machine are drawn.
2. System technical scheme
(1) working process: start the machine PLC to control the stepping motor to drive the billet number spraying machine to the corresponding position, press the start key to send a control signal to the control part (PLC), and the control part sends a control signal to the execution part (mainly the walking part and the number spraying part, the walking part drives the nozzle to be close to the billet surface, and then the nozzle sprays the number). After the number spraying is completed, the nozzle rises to clean the number plate. Move the spray number to the next blank again.
(2) Required functions: walking component function (whole machine moves left and right, numbering component moves up and down, nozzle moves left and right) and numbering component function (nozzle numbering, number plate cleaning and number plate replacement). Among them, the number is (0-9) ten digits, and the number can be changed and replaced. The size of each number is 35mmx 15mm, and the number spacing is 5mm.
(3) Implementation scheme:
Realization of walking function: Because the number spraying on the billet does not need to be positioned very accurately, the whole number spraying machine is moved roughly by manually controlling the stepping motor. The hydraulic cylinder is used to provide the power to push the numbering parts, and the travel switch is used to control the motor to move the numbering parts up and down. The down stroke switch can control the distance between the numbered part and the billet surface, and send a signal to make the nozzle start painting and move to the right. Driven by hydraulic cylinder, the roller rolls on the guide frame to realize the forward and backward movement of the spraying mechanism, and the motor is controlled by the travel switch to realize the left and right movement of the nozzle. The right travel switch can control the spray nozzle to stop painting and return to the initial position, and control the spray number component to move upward.
The specific implementation scheme of the numbering function was decided by my classmate.
3. Schedule
Read and learn relevant information and knowledge carefully for 3-4 weeks, and translate English documents.
Transmission scheme and overall design of walking parts of 5-7 week billet marking machine
8-9 weeks to determine the result parameters of the walking parts of the blank spraying machine.
10- 13: Complete the assembly drawing and parts working drawing of the walking part of the billet marking machine.
14- 15 weeks to prepare and conduct graduation defense.
4 1. Basis and significance of design (or research)
Cross shaft is an important part of automobile universal joint, with many specifications and varieties and large demand. At present, domestic production mostly adopts open die forging and tire die forging, and the technological process is: blank making → die forging → trimming. The produced forgings have large flash, large machining allowance and dimensional tolerance, and low material utilization rate; Moreover, there are many process links, poor quality of forgings and low production efficiency.
In contrast, the cross shaft formed by cold extrusion has the following advantages:
1, improve labor productivity. Using cold extrusion technology instead of cutting to manufacture mechanical parts can greatly improve productivity.
2. Ideal surface roughness and dimensional accuracy can be obtained. The precision of cold-extruded spider parts can reach ITg-IT8 level, and the surface roughness can reach Ra O.2 ~ 1.6. Therefore, the cross shaft parts formed by cold extrusion are rarely cut again, and only need to be finely ground where the requirements are particularly high.
3. Improve the mechanical properties of parts. The cold working hardening of metal after cold extrusion forms a reasonable fiber streamline distribution in the parts, which makes the strength of the parts higher than that of raw materials.
4. Reduce the cost of parts. Cold extrusion is to use the plastic deformation of metal to manufacture parts with the required shape, so it can greatly reduce the cutting process, improve the utilization rate of materials, and thus greatly reduce the cost of parts.
2. Overview of similar design (or similar research) at home and abroad.
Machining cross shaft parts by cutting method has many production processes, low efficiency and serious waste of materials, and cutting will destroy the metal streamline structure of the parts. At present, most cross shaft parts in China are formed by hot die forging, which will produce defects such as oxidation and decarbonization when heating, which will inevitably lead to waste of energy. Subsequent machining not only wastes a lot of materials, but also the internal and external quality of products is not ideal.
The cross shaft is produced by closed flash-free extrusion process, and the forgings have no flash, which can significantly reduce the production cost and improve the product quality and production efficiency.
(1) can not only save the metal consumption of flash, but also greatly reduce or cancel trimming, saving 30% of materials; The power consumption can be reduced by 30% because the precision of forgings reduces the processing capacity;
(2) The forging quality is significantly improved, the cross-axis orthogonality is good, the structure is compact, the streamline distribution is reasonable, no fiber is cut off, and the torsional fatigue life index is improved by 2-3 times on average;
(3) Due to one-time extrusion molding, the productivity is increased by 25%.
Numerical simulation technology is the key technology of CAE. By establishing the corresponding mathematical model, the whole process of the process can be analyzed in the computer before making expensive and time-consuming molds or accessories. Not only can we intuitively obtain various information such as temperature, stress and load through graphics, data and other methods, but also we can predict the existing defects. By comparing the process parameters of different schemes, the law is summarized, and then the process optimization is realized. Numerical simulation technology has shown unparalleled advantages in ensuring the quality of workpieces, reducing material consumption, improving production efficiency and shortening trial production cycle.
At present, commercial softwares for simulation of bulk forming process have entered the China market, such as Deform and Autoforge. DEFORM software is a process simulation system based on finite element, which is used to analyze various forming processes and heat treatment processes in metal forming and related industries. DEFORM can predict the metal flow in actual industrial production without trial mold, which is an efficient and practical tool to reduce manufacturing cost and shorten research and development cycle. The industrial practice of more than 20 years has clearly proved that DEFORM based on finite element method has excellent accuracy and stability, and the simulation engine has maintained amazing accuracy in the aspects of large metal flow, travel load and product defect prediction.
3. The content of project design (or research)
1) complete the radial extrusion process analysis of the cross shaft, and complete the design of the die assembly drawing and part drawing.
2) Establish a three-dimensional model of radial extrusion die for cross shaft.
3) Numerical simulation of radial extrusion process of cross shaft.
4) Translation of relevant English materials.
4. Design (or research) methods
1) to complete the process analysis of radial extrusion forming of cross shaft, and draw the die assembly drawing and parts drawing.
2) Write a graduation thesis and establish a three-dimensional model of radial extrusion die for cross shaft.
3) Complete the numerical simulation of radial extrusion forming process of cross shaft.
4) Consult more than 20 papers related to the subject.
5) Complete the paper 12000 words.
6) Translation of more than 10000 English printed symbols.
5. Implementation plan
04-06 week: literature search, opening report.
07- 10 week: process analysis, drawing two-dimensional drawing of mold and designing three-dimensional model of mold.
1 1- 13 weeks: numerical simulation.
14- 16 weeks: writing graduation thesis.
17 weeks: reply.
Opening Report of Graduation Thesis of Mechanical Major 5 I. Background of Graduation Design Topic Selection
Three-stage bevel-cylindrical gear reducer, the first stage is bevel gear reduction, the second and third stages are cylindrical gear reduction. This reducer has the advantages of compact structure, multi-output, high transmission efficiency, stable operation, large transmission ratio, small volume, convenient processing and long service life. Therefore, with the rapid development of China's socialist construction, many domestic units have designed and manufactured this kind of reducer by themselves, which has been widely used in mechanical equipment in national defense, mining, metallurgy, chemical industry, textile, lifting and transportation, construction engineering, food industry and instrument manufacturing, and will be widely used in the future.
Second, the main research content and significance
Firstly, this paper introduces the research background of belt conveyor transmission device, and through the detailed analysis of the literature, expounds the related contents of gear and reducer. In the technical route, the selection of gears and shafts, the selection of basic parameters, the calculation of geometric dimensions and the check calculation of two main strengths are discussed, and some technical problems that need to be considered in this design are introduced. Establish a timetable for graduation design writing and provide guidance for future design work. Finally, some references are given, which can be used to consult relevant materials and bring convenience to your own design.
The research and design of this project is the last learning opportunity and the most professional exercise in my college career. It will make us more aware of the problems and difficulties in practical work, and also give me a comprehensive summary of my professional knowledge and a general understanding of the actual mechanical engineering design process. I believe this will be of substantial help to my future work.
Third, the implementation plan
Collect relevant information: 20XX April10-April 16.
Preparation for opening the topic: April1July-April 20th.
Determine the design scheme: April 21-April 28.
Conduct relevant design calculations: April 28th-May 8th.
Drawing: May 9-May 15.
Decoration materials: May1May-June 16
Writing time of design description: May1July-May 20th.
Prepare a defense:
Four. refer to
[1] Wang Kun and other mechanical design curriculum design higher education press, 1995.
[2] Qiu Xuanhuai's Mechanical Design, Fourth Edition Higher Education Press, 1997.
[3] Pu Mechanical Design Seventh Edition Higher Education Press, 2000.
[4] Ren Jinquan Mechanical Design Curriculum Design An Jiaotong University Press, 2002.
[5] Xu Zhenning Mechanical Part People's Education Press, 1959.
[6] Practical Manual of Mechanical Design of Editorial Board of Machinery Industry Press, 2008
6 1. Basis and significance of design (or research)
Cross shaft is an important part of automobile universal joint, with many specifications and varieties and large demand. At present, domestic production mostly adopts open die forging and tire die forging, and the technological process is: blank making → die forging → trimming. The produced forgings have large flash, large machining allowance and dimensional tolerance, and low material utilization rate; Moreover, there are many process links, poor quality of forgings and low production efficiency.
In contrast, the cross shaft formed by cold extrusion has the following advantages:
1, improve labor productivity. Using cold extrusion technology instead of cutting mechanical parts can greatly improve productivity.
2. Ideal surface roughness and dimensional accuracy can be obtained. The precision of cold-extruded spider parts can reach ITg-IT8 level, and the surface roughness can reach Ra O.2 ~ 1.6. Therefore, the cross shaft parts formed by cold extrusion are rarely cut again, and only need to be finely ground where the requirements are particularly high.
3. Enhance the mechanical properties of parts. The cold working hardening of metal after cold extrusion forms a reasonable fiber streamline distribution in the parts, which makes the strength of the parts higher than that of raw materials.
4. Reduce the cost of parts. Cold extrusion is to use the plastic deformation of metal to manufacture parts with the required shape, so it can greatly reduce the cutting process, improve the utilization rate of materials, and thus greatly reduce the cost of parts.
2. Overview of similar design (or similar research) at home and abroad.
Machining cross shaft parts by cutting method has many production processes, low efficiency and serious waste of materials, and cutting will destroy the metal streamline structure of the parts. At present, most cross shaft parts in China are formed by hot die forging, which will produce defects such as oxidation and decarbonization when heated, which will inevitably lead to waste of energy. Subsequent machining will not only waste a lot of materials, but also the internal and external quality of products is not ideal.
The cross shaft is produced by closed flash-free extrusion process, and the forgings have no flash, which can significantly reduce the production cost and improve the product quality and production efficiency;
(1) can not only save the metal consumption of flash, but also greatly reduce or cancel trimming, saving 30% of materials; The power consumption can be reduced by 30% because the precision of forgings reduces the processing capacity;
(2) The forging quality is significantly enhanced, the cross axis is orthogonal, the structure is compact, the streamline distribution is reasonable, the fiber is not cut, and the torsional fatigue life index is improved by 2-3 times on average;
(3) Due to one-time extrusion molding, the productivity is increased by 25%.
Numerical simulation technology is the key technology of CAE. By establishing the corresponding mathematical model, the whole process of the process can be analyzed in the computer before making expensive and time-consuming molds or accessories. Not only can we intuitively obtain various information such as temperature, stress and load through graphics, data and other methods, but also we can predict the existing defects. By comparing the process parameters of different schemes, the law is summarized, and then the process optimization is realized. Numerical simulation technology has shown unparalleled advantages in ensuring the quality of workpieces, reducing material consumption, improving production efficiency and shortening trial production cycle.
At present, commercial softwares for simulation of bulk forming process have entered the China market, such as Deform and Autoforge. DEFORM software is a process simulation system based on finite element, which is used to analyze various forming processes and heat treatment processes in metal forming and related industries. DEFORM can predict the metal flow in actual industrial production without trial mold, which is an efficient and practical tool to reduce manufacturing cost and shorten research and development cycle. More than 20 years of industrial practice has clearly proved that DEFORM based on finite element method has excellent accuracy and stability, and the simulation engine has maintained amazing accuracy in metal flow, stroke load, product defect prediction and so on.
3. The content of project design (or research)
1) complete the radial extrusion process analysis of the cross shaft, and complete the design of the die assembly drawing and part drawing.
2) Establish a three-dimensional model of radial extrusion die for cross shaft.
3) Numerical simulation of radial extrusion process of cross shaft.
4) Translation of relevant English materials.
4. Design (or research) methods
1) to complete the process analysis of radial extrusion forming of cross shaft, and draw the die assembly drawing and parts drawing.
2) The graduation thesis established a three-dimensional model of radial extrusion die for cross shaft.
3) Complete the numerical simulation of radial extrusion forming process of cross shaft.
4) Consult more than 20 papers related to the subject.
5) Complete the paper 12000 words.
6) Translate more than 10000 English printed symbols.
5. Implementation plan
04-06 week: literature search, opening report.
07- 10 week: process analysis, drawing two-dimensional drawing of mold and designing three-dimensional model of mold.
1 1- 13 weeks: numerical simulation.
14- 16 weeks: writing graduation thesis.
17 weeks: reply.
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