Hard and meaningful college life is coming to an end. Before graduating from college, everyone should write a graduation design. Before graduation design, the tutor will ask for a good opening report to refer to the opening report he needs! The following is the opening report paper of mechanical design, manufacturing and automation that I collected for you. Welcome to share.

Opening Report of the Paper on Mechanical Design, Manufacturing and Automation 1 Title: On the Design of Injection Mold for the Lid.

Major: mechanical design, manufacturing and automation.

Class: xxx

Name: XXX

Student number: xxx

Instructor: Huang xx

First, the purpose and significance of the topic

Compared with metals, plastics have low density, but high strength, excellent insulation and excellent chemical resistance. In machinery, chemical industry, automobile, aerospace and other fields, plastics have replaced metals on a large scale. At present, plastic products are almost everywhere in industry and daily life. Therefore, mastering the skills of mold design is extremely important for us who are engaged in related industries in the future. In the process of doing this topic, I also exercised the skills of using CAD, CAE drawing software such as UG and AUTOCAD. So as to get comprehensive training in plastic parts structure design, plastic molding process analysis, plastic mold digital design, plastic mold parts material selection, heat treatment, plastic mold parts manufacturing, information retrieval, English translation and so on. To lay a solid foundation for the future work adaptation period.

Second, the research status and development trend of China mold industry.

Since 1980s, with the support and guidance of national industrial policies and a series of supporting national economic policies, China's mold industry has developed rapidly, with an average annual growth of 13%. /kloc-in 0/99, the output value of China mold industry was 24.5 billion. By 2002, the total output value of molds in China was about 36 billion yuan, of which plastic molds accounted for about 30%. In the future mold market, the proportion of plastic molds in the total mold will gradually increase.

After more than half a century, China's plastic mold industry has made great progress and the mold level has been greatly improved. In terms of molding technology, great progress has also been made in the innovation of multi-material plastic molding mold, efficient multi-color injection mold, insert interchange structure and core-pulling demoulding mechanism.

In manufacturing technology, the application level of CAD/CAM/CAE technology has reached a new level, and a considerable number of CAD/CAM systems have been introduced one after another, represented by enterprises that produce household appliances. For example, UG Ⅱ of EDS Company in the United States, Pro/em engineer of ParametricTechnology Company in the United States, CADS5 of CV Company in the United States, DOCT5 of Deltacam Company in the United Kingdom, CRADE of HZS Company in Japan, Cimatron of Israel Company, C-Mold of AC-Tech Company in the United States, Although the introduction of MPA mold analysis software from Moldflow Company in Australia has cost a lot of money, it has realized the integration of CAD/CAM in China's mold industry, supported CAE technology in the molding process, achieved certain technical and economic benefits, and promoted the development of China's mold CAD/CAM technology.

At present, there is a great demand for high-grade molds in the domestic market, but domestic molds must meet the needs of users in terms of quality and delivery time. In addition, with the increase of labor cost in industrialized countries in recent years, its mold production is shifting to developing countries, especially Southeast Asian countries. Therefore, as long as the quality of domestic molds can be improved and the delivery date can be guaranteed, the prospect of mold export is very optimistic.

In the future, molds in China will present ten development trends: First, molds will become larger and larger. Second, the precision of the mold is getting higher and higher. Third, the multi-functional composite mold will be further developed. In addition to stamping parts, the new multifunctional compound die also undertakes assembly tasks such as lamination, tapping, riveting and locking, which requires higher and higher performance of steel. Fourthly, the proportion of hot runner mold in plastic mold is increasing gradually. Fifth, with the continuous improvement and development of plastic molding technology, gas-assisted molds and molds suitable for high-pressure injection molding will also develop accordingly. Sixth, the application of standard parts will be more and more extensive. Seventh, the prospect of fast and economical molds is very broad. Eight, with the development of lightweight products such as automobiles and motors, the proportion of die-casting dies will continue to increase, and at the same time, the life and complexity of die-casting dies will also be put forward higher and higher requirements. 9. The process of replacing steel with plastic and wood with plastic has been further accelerated, and the proportion of plastic molds will continue to increase. Ten, is the mold technology content will continue to improve, the proportion of high-grade molds will continue to increase, which is also the change of mold market trend caused by product structure adjustment.

III. Key Issues and Difficulties of the Project

1. Defines the design requirements of plastic parts.

Read the parts drawing of plastic parts carefully, and consider the feasibility and economy of injection molding process from the aspects of plastic variety, plastic part shape, dimensional accuracy and surface roughness. If necessary, discuss with the product designer the material type of plastic parts and the possibility of structural modification.

2. Use UG and CAD software to complete the mold design.

The parting surface should be selected at the maximum contour of plastic parts. Meet the appearance quality requirements of plastic parts: during injection molding, the mold surface will inevitably leave traces of flash or split seam on the plastic parts, so it is best not to choose the parting surface on the bright outer surface of plastic parts or the corner with arc. Among them, parting is the most important part.

3, mold structure design

1). Selection of molding position and parting surface of plastic parts;

2) Determine the number of mold cavities, arrange the layout of cavities and runners, and set the gate position;

3). Structural design of die working parts;

4). Ejection mechanism design;

5). Selection of tie rod form;

6). Exhaust mode design.

4. Determine the overall size of the mold and choose the mold base.

Mold base has been gradually standardized. Select the mold base according to the mold base atlas provided by the manufacturer, and draw the complete structure diagram of the mold on the basis of the design of the above mold parts.

5. Assembly drawing of mold structure and working drawing of parts.

The drawing of the general plan of mold must conform to the national standard of mechanical drawing, and there is no difference between the drawing method and the general mechanical drawing method in principle. Just to clearly express the shape of the molded product in the mold and the setting of the gate position. On the top view of the general plan of the mold, the fixed mold can be removed and only the top view of the moving mold can be drawn.

The mold assembly drawing shall include necessary dimensions, such as closing size, overall size, characteristic size (the size of locating ring matched with injection molding machine), assembly size, limit size (the starting and ending point of moving parts) and technical conditions, and a parts list shall be prepared.

Usually, the processing cycle of the main working parts is long and the processing precision is high, so we should draw them carefully first, and try to use standard parts for the rest parts.

Fourth, research process planning.

1. Design of three-dimensional model of bearing: According to the size of box cover parts, design its three-dimensional model, analyze the specific characteristics of the model, and determine the basic structure of injection mold.

2. Parting surface design: according to the structure of the box cover parts, dismantle the mold and design the parting surface of the core, mold and fixed mold.

3. Create the mold components of the plastic mold: generate the molding parts of the mold, such as core, moving mold and fixed mold.

4. Mold filling and mold opening simulation: through mold filling and simulation, check whether the plastic parts with single physical characteristics injected by the mold meet the design requirements; Through mold opening simulation, check whether mold opening can be carried out smoothly and whether there is interference in mold opening, so as to determine the rationality of mold design.

Verb (abbreviation for verb) Reference:

1. edited by Zhang Weihe, Practical Course of Injection Mold Design [M], Chemical Industry Press, September 2007.

2. Qu Huachang, Editor-in-Chief, Plastic Forming Technology and Mold Design [M], Machinery Industry Press, April 2000

3. Qu Huachang. Plastic molding technology and mold design. Beijing: Machinery Industry Press, 1996, 1-3.

4. Liu Jize. Design scheme of plastic product interior and mould. Beijing: China Light Industry Press, 200 1, 4.

5. Li Dequn. Development of CAD/CAM/CAE for injection mould abroad. Mould industry, 1994, (9):47-53

6. Liu Yuejun and Zhai. Process control of polymer injection molding [J]. Application of engineering plastics, 200 1, 29(9):4 1-42.

7. Easy Xiao Su. Preparation and processing of polymer materials. Hangzhou: Zhejiang University Press,1997,4-8.

8. xing Haitao High-level equipment gathered in Shanghai to exhibit high-quality molds [[J]. Machinist/Cold Processing, 2002, (4): 1

Sixth, the guidance of teachers' opinions.

Instructor's signature:

XX year XX month XX day

Abstract: This paper analyzes the shortcomings existing in the management and maintenance of highway engineering machinery construction equipment, and puts forward some improvement measures, including improving the ideological understanding of equipment management and maintenance, strictly implementing various systems of equipment management and maintenance, clarifying responsibilities, improving the quality of management and maintenance personnel, strengthening the management and maintenance of engineering machinery and equipment on the construction site, optimizing the management and maintenance system, paying attention to dynamic management and maintenance, and further improving the management and maintenance level of machinery and equipment.

Keywords: highway engineering; Mechanical construction equipment; Management and maintenance

introduce

Highway engineering construction is a systematic and complicated work. In order to ensure the construction progress, it is necessary to use mechanical equipment in the construction process. At the same time, in order to promote the effective play of mechanical equipment, it is necessary to strengthen the management and maintenance of equipment. There are many factors that affect the management and maintenance of highway engineering machinery construction equipment, such as construction site conditions, management and maintenance personnel, management and maintenance system, etc. With the increasing number of highway engineering construction and the continuous improvement of people's living standards, it is undoubtedly of great practical significance to strengthen the management and maintenance of mechanical equipment and improve the management and maintenance level. Although the construction unit pays attention to management and maintenance at present, due to the lax implementation of relevant systems, some staff members are not responsible for management and maintenance, which still leads to defects and deficiencies in management and maintenance. Further improvement and perfection measures should be taken to prevent quality and safety accidents of construction machinery and equipment, reduce unnecessary losses, ensure the construction progress and improve the construction efficiency of highway engineering.

1, Frequently Asked Questions on Management and Maintenance of Construction Equipment of Highway Engineering Machinery

The management and maintenance of mechanical equipment is an important work in highway engineering construction. Doing this work well can ensure that the mechanical equipment is in a good performance state and realize the effective prevention of quality and safety accidents. And promote the improvement of mechanical equipment management and maintenance level, promote the effective implementation of various system measures, and improve the sense of responsibility of management and maintenance personnel. It can also nip equipment failures and safety accidents in the bud, avoid unnecessary losses, ensure the construction progress and promote the improvement of highway engineering quality.

1. 1 Thought is not taken seriously enough.

Some construction units will focus on market expansion, speed up the construction progress and improve the efficiency of project construction. Insufficient attention was paid to the management and maintenance of mechanical equipment, and effective management and maintenance measures were not taken according to specific needs. The management and maintenance system has not been strictly implemented, and the corresponding funds and equipment management and maintenance investment are insufficient, which restricts the smooth progress of construction and may also bring unnecessary losses to highway construction. In addition, although highway engineering supervision has played a very important role in ensuring construction safety and improving equipment performance, there are still problems and deficiencies. Generally speaking, it is manifested in the following aspects: the responsibilities and obligations of management and maintenance units and staff are not specified in detail, the status of management and maintenance is not clearly defined, its functions are not fully determined, and its role is not clearly understood, which leads to the inadequate management and maintenance of mechanical equipment.

1.2 Management and maintenance measures have not been implemented.

Although highway construction units have generally established the management and maintenance system of machinery and equipment, there are clear provisions on the objectives, processes and responsibilities of relevant staff. However, due to the weak sense of responsibility of management and maintenance personnel, these system measures have not been strictly implemented, and effective management and maintenance methods of mechanical equipment have not been adopted during construction, so it is difficult to find hidden dangers of equipment in time, which is not conducive to improving management and maintenance level. In addition, mechanical equipment failure prevention work is not in place. When some construction workers entered the site construction, they did not operate the machinery and equipment strictly according to the requirements of the specifications, and the preventive maintenance and daily inspection and maintenance were insufficient. The management and maintenance of the construction site were not in place, and there were security risks, which restricted the effective play of the machinery and equipment.

1.3 Deficiencies in equipment management and maintenance

In order to ensure the safety of highway construction, it is necessary to strengthen the management and maintenance of mechanical equipment and implement the management and maintenance system. The management and maintenance system has played an important role in ensuring the project quality and construction period, and has also been widely recognized by the society. However, these systems have not been effectively implemented, facing many problems, and the management and maintenance of mechanical equipment are facing more problems and more severe challenges. For example, the business competition of construction units is becoming more and more fierce. With the establishment of management and maintenance system, the number of construction units is increasing, and the business competition between them is becoming more and more fierce. In this case, the construction unit has to explore new methods and means to occupy a favorable position in the competition and promote its own development, which may neglect the maintenance and management of mechanical equipment. However, the quality of mechanical equipment management and maintenance personnel in some construction units is not high, which is mainly manifested in the lack of professional knowledge, practical experience, low professional quality and failure to perform their duties seriously, which affects the improvement of mechanical equipment management and maintenance level.

2, highway engineering machinery construction equipment management and maintenance suggestions.

In order to effectively deal with the shortage of management and maintenance of highway engineering machinery construction equipment, combined with the specific situation of highway engineering construction, the author believes that the following measures should be taken to improve and perfect.

2. 1 Improve the ideological understanding of equipment management and maintenance.

The construction unit and relevant leaders should improve their ideological understanding of the management and maintenance of mechanical equipment and realize the significance of strengthening this work to promote the smooth progress of construction and improve the quality and efficiency of engineering construction. And formulate and improve the management and maintenance measures of mechanical equipment, increase support in terms of funds and personnel, and lay a good foundation for improving the management and maintenance level.

2.2 Strictly implement various systems of equipment management and maintenance.

Combined with the needs of highway engineering construction, improve the system and measures of mechanical equipment management and maintenance, promote the smooth construction, and promote the institutionalization and standardization of management and maintenance. At the same time, it is also necessary to clarify the responsibilities of relevant units and staff, strictly implement various institutional measures for management and maintenance, establish a strict responsibility system, effectively implement the system, promote the continuous improvement of the management and maintenance level of mechanical equipment, and give full play to the comprehensive performance of mechanical equipment. Pay attention to the management of mechanical equipment, and put it reasonably to meet the construction needs. Pay attention to the application of various testing equipment and testing methods, master the basic situation of equipment operation, and improve the management and maintenance effect of mechanical equipment. Strengthen the inspection of mechanical equipment, carry out on-site inspection and patrol, eliminate hidden dangers in time, and promote the comprehensive performance of mechanical equipment to get the best play.

2.3 clear responsibilities, improve the quality of management and maintenance personnel.

The main duties of the management and maintenance of highway engineering construction machinery and equipment are: to be responsible for the inspection and patrol of construction machinery and equipment, to carry out regular and irregular inspections, to master the basic situation of equipment operation, to find and deal with existing defects in time, and to make the machinery and equipment run and play a better role. Therefore, the management and maintenance of mechanical equipment should run through the whole process of engineering construction, which is of great significance to ensure the safe and orderly progress of highway construction, promote employees to abide by various rules and regulations of management and maintenance, and ensure the quality and efficiency of highway engineering. Combined with the actual situation of highway engineering construction, the following measures can be taken to implement management and maintenance measures: introducing and cultivating high-quality management and maintenance talents to continuously improve the quality of employees. Strengthen the professional ethics construction of highway construction management and maintenance personnel, continuously improve the professional ethics level of staff, and manage and maintain machinery and equipment in strict accordance with rules and regulations. Strengthen the construction of management and maintenance team, establish a high-quality and high-level work team, and provide guarantee for improving the management and maintenance level of mechanical equipment. Pay attention to the training of construction personnel, so that they can operate in strict accordance with the requirements of the specification to prevent failures.

2.4 Strengthen the management and maintenance of engineering machinery and equipment on the construction site.

Pay attention to the management training of equipment management and maintenance personnel, improve safety awareness, carry out equipment maintenance in strict accordance with the requirements of specifications, and find and deal with existing defects in time. Strengthen the management and maintenance of mechanical equipment. In fact, the management and maintenance of highway engineering machinery and equipment are facing many problems and challenges. In view of these problems and challenges, combined with the actual situation of highway engineering construction, improve ideological understanding and ensure that mechanical equipment is in good performance and working condition. Strengthening the patrol and inspection of highway construction site, carrying out regular and irregular inspections, and doing a good job in daily inspection of construction machinery and equipment to ensure that the equipment is in good performance and running state are conducive to ensuring the construction progress and improving the quality and efficiency of engineering construction. Establish and implement mechanical equipment management and maintenance measures, eliminate all kinds of hidden dangers in time, and improve the management and maintenance level of mechanical equipment.

2.5 Optimize the management and maintenance system and pay attention to dynamic management and maintenance.

For example, optimize the management and maintenance system of mechanical equipment, fully grasp the status quo of management and maintenance, and clarify the management and maintenance tasks. Improve the management and maintenance plan, clarify the organizational functions of management and maintenance, improve the corresponding reporting mechanism, take prevention and control measures in advance, reduce the probability of safety accidents of on-site mechanical equipment, improve the pre-control ability of safety accidents, and effectively prevent safety accidents of mechanical equipment. It is very necessary to manage and maintain the mechanical equipment dynamically. It is necessary to strengthen the investigation of the basic situation on site and use information technology and modern computer technology to manage and maintain dynamically. Establish mechanical equipment management and maintenance database, fully grasp the basic situation and current situation, analyze relevant data, provide reference and basis for improving and perfecting management and maintenance system, and provide effective data and technical support for improving the management and maintenance level of mechanical equipment.

3. Conclusion

This paper mainly studies the management and maintenance measures of mechanical equipment in highway engineering. The management and maintenance of mechanical equipment is a systematic and complicated work, involving all aspects of the project. In engineering construction, we should do a good job in management and maintenance, and attach importance to the effective application of management and maintenance measures. But there are still many aspects worth studying and improving. For example, the establishment of management and maintenance early warning mechanism and the implementation of dynamic management and maintenance need to be deeply studied and discussed, and applied to management and maintenance practice to further improve the management and maintenance level of mechanical equipment.

References:

Cao Lin. Common Problems in Management and Maintenance of Construction Equipment of Highway Engineering Machinery [J]. Automobile Maintenance, 20 15 (2): 2-3.

[2] Zhang Qingjiang. On the management and maintenance of construction equipment of highway engineering machinery [J]. Jiangxi Building Materials, 20 16 (3): 202-203.

[3] Cao Minghui. Mechanical equipment management in highway engineering construction [J]. Building mechanics technology and management, 20 1 1 (3): 145-47.

[4] Liu Yifeng, Teng Jugen. Analysis on Maintenance and Management of Highway Engineering Machinery and Equipment [J]. China Hi-tech Enterprise, 2015 (6):119-120.

;