Sample Proposal Report on Mechanical Design, Manufacturing and Automation Thesis

The arduous and meaningful university life is coming to an end. Before graduating from university, everyone must write a graduation project. Before doing the graduation project The instructor will ask you to write a proposal report first, so you can refer to the proposal report you need! Below are the thesis proposal papers on mechanical design, manufacturing and automation that I have collected for you. You are welcome to share them.

Mechanical Design, Manufacturing and Automation Thesis Proposal 1

Topic Name: Brief Discussion on Injection Mold Design for Box Covers

Major: Mechanical Design, Manufacturing and Automation

Class: xxx

Name: XXX

Student number: xxx

Instructor: Huang xx

1. The purpose and significance of the topic

Compared with metals, plastics have lower density, but higher strength, excellent insulation properties, and very good resistance to chemical corrosion. They are widely used in machinery, chemical industry, automobiles, aerospace, etc. In the field of plastics, metal has been replaced on a large scale. At present, plastic parts are almost everywhere in various fields of industry and daily life. Therefore, mastering the skill of mold design is extremely important for us who will engage in related industries in the future. During the production process of this project, we also practiced the skills of using CAD, CAE drawing software such as UG and AUTOCAD. This enables us to obtain comprehensive training in plastic part structural design, plastic molding process analysis, plastic mold digital design, plastic mold parts material selection, heat treatment, plastic mold parts manufacturing, as well as data retrieval, English translation, etc., laying the foundation for the future work adaptation period. A solid foundation.

2. Research status and development trends of my country's mold industry

Since the 1980s, under the support and guidance of national industrial policies and a series of supporting national economic policies, my country's The mold industry has developed rapidly, with an average annual growth rate of 13. In 1999, the output value of my country's mold industry was 24.5 billion yuan. By 2002, the total output value of my country's mold industry was approximately 36 billion yuan, of which about 30% were plastic molds. In the future mold market, the proportion of plastic molds in the total mold volume will gradually increase.

After more than half a century, my country's plastic mold industry has developed greatly from its inception to the present, and the level of molds has been greatly improved. In terms of molding technology, great progress has also been made in the innovation of multi-material plastic molding molds, high-efficiency multi-color injection molds, insert interchangeable structures and core-pulling demoulding mechanisms.

In terms of manufacturing technology, the application level of CAD/CAM/CAE technology has reached a new level. Enterprises that produce household appliances, as representatives, have successively introduced a considerable number of CAD/CAM systems, such as the American EDS UGⅡ, Pro/Emgineer of American Parametric Technology Company, CADS5 of American CV Company, DOCT5 of British Deltacam Company, CRADE of Japanese HZS Company, Cimatron of Israeli Company, C-Mold of American AC-Tech Company and MPA Plastics of Australian Moldflow Company Model analysis software, etc. Although the introduction of these systems and software cost a lot of money, it has achieved certain technical and economic benefits in my country's mold industry by realizing the integration of CAD/CAM and supporting CAE technology in the molding process, promoting and promoting the development of my country's mold industry. The development of mold CAD/CAM technology.

At present, the domestic market has a huge demand for mid-to-high-end molds, but domestic molds must meet user needs in terms of quality and delivery time. In addition, with the increase in labor costs in industrialized countries in recent years, their mold production is moving to developing countries, especially Southeast Asian countries. Therefore, as long as the quality of domestic molds can be improved and the delivery time can be guaranteed, the prospects for mold exports are very optimistic.

In the future, my country's molds will present ten major development trends: First, molds will become increasingly large.

Second, the precision of molds is getting higher and higher. Third, multi-functional composite molds will be further developed. In addition to stamping and forming parts, the new multi-functional composite mold is also responsible for assembly tasks such as lamination, tapping, riveting and locking, and the performance requirements for steel are also getting higher and higher. Fourth, the proportion of hot runner molds in plastic molds is gradually increasing. Fifth, with the continuous improvement and development of plastic molding technology, gas-assisted molds and molds adapted to high-pressure injection molding and other processes will develop accordingly. Sixth, the application of standard parts will become increasingly widespread. Seventh, the prospect of rapid economic mold is very broad. Eighth, as products such as vehicles and motors develop toward lightweighting, the proportion of die-casting molds will continue to increase. At the same time, higher and higher requirements will be placed on the lifespan and complexity of die-casting molds. 9. As a result, the process of replacing steel and wood with plastic is further accelerated, and the proportion of plastic molds will continue to increase. 10. The technological content of molds will continue to increase, and the proportion of medium and high-end molds will continue to increase. This is also a change in the mold market trend caused by product structure adjustment.

3. Key issues and difficulties of the subject

1. Clarify the design requirements of plastic parts

Carefully read the parts drawing of the plastic parts, from the plastic type of the product, the plastic The feasibility and economy of the injection molding process should be considered in terms of part shape, dimensional accuracy, surface roughness and other aspects. If necessary, the material type and structural modification of the plastic part should be discussed with the product designer.

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

The parting surface should be selected at the maximum contour of the plastic part. Meet the appearance quality requirements of plastic parts: During injection molding, the parting surface will inevitably leave traces of overflow or seams on the plastic part. Therefore, it is best not to choose the parting surface on the bright outer surface of the plastic part or with rounded edges. The corner of the arc. Partitioning is the most important part.

3. Mold structure design

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

2) Determination of the number of mold cavities, The arrangement of the mold cavity, the layout of the runner and the location of the gate;

　3). Structural design of the mold working parts;

　4). Design of the ejection mechanism;

5). Selection of the form of the pulling rod;

6). Design of the exhaust method.

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

Mold bases have gradually been standardized. According to the mold base album provided by the manufacturer, select the mold base. In the above mold Based on the parts design, a complete structural diagram of the mold is initially drawn.

5. Drawing of mold structure general assembly drawings and parts working drawings

The drawing of mold general drawings must comply with the national standards for mechanical drawing, and its drawing method is in principle no different from the general mechanical drawing method. , just to more clearly express the shape of the molded product in the mold and the setting of the gate position, in the top view of the mold general drawing, the fixed mold can be removed and only the top view of the movable mold part is drawn.

The mold assembly drawing should include necessary dimensions, such as mold closing dimensions, overall dimensions, characteristic dimensions (positioning ring dimensions that match the injection molding machine), assembly dimensions, limit dimensions (moving starting and ending points of movable parts) and technology conditions, writing parts details, etc.

Usually, the main working parts have a long processing cycle and high processing precision, so they should be carefully drawn first, and the remaining parts should be standard parts as much as possible.

IV. Project Research Process Planning

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

2. Design of parting surface: Remove the mold according to the structure of the lid parts, and design the parting surface of the core, mold and fixed mold.

3. Create plastic mold components: generate molding parts such as cores, movable molds, and fixed molds.

4. Mold filling and opening simulation: through filling simulation, check whether the plastic parts with single entity characteristics injected by the mold meet the design requirements; through opening simulation, check whether the mold opening is It can proceed smoothly and whether interference occurs during mold opening, thereby determining the rationality of the mold design.

5. References:

1. Co-edited by Zhang Wei, Practical Tutorial on Injection Mold Design [M], Chemical Industry Press, 2007.9

2. Chief editor-in-chief, Qu Huachang , Plastic molding technology and mold design [M], Machinery Industry Press, 2000.4

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

4. Liu Jize. Plastic product interior and mold design proposal. Beijing: China Light Industry Press, 2001, 4

5. Li Dequn. Overview of the development of foreign injection mold CAD/CAM/CAE. Mold industry , 1994, (9): 47-53

6. Liu Yuejun, Zhai Jinping. Process control of polymer injection molding [[J]. Engineering Plastics Applications, 2001, 29(9): 41-42

7. Yi Xiaosu. Preparation and processing of polymer materials. Hangzhou: Zhejiang University Press, 1997, 4-8

8. Xing Haitao. Quality Mold Shencheng Exhibition style and high-level equipment gathered in Shanghai [[J]. Mechanical workers/cold processing, 2002, (4): 1

6. Opinions of the instructor

Signature of the instructor:

Thesis Proposal on Mechanical Design, Manufacturing and Automation on XX, XX, XX, Part 2

Abstract: The deficiencies in the management and maintenance of highway engineering machinery construction equipment are analyzed, and improvements and improvements are proposed. Measures include improving the ideological understanding of equipment management and maintenance, strictly implementing various systems for equipment management and maintenance, clarifying responsibilities and improving the quality of management and maintenance personnel, strengthening the management and maintenance of engineering machinery equipment at the construction site, optimizing the management and maintenance system, and paying attention to Dynamic management and maintenance further improves the management and maintenance level of mechanical equipment.

Keywords: highway engineering; mechanical construction equipment; management and maintenance

Introduction

Highway engineering construction is a systematic and complex work. In order to ensure Construction progress, it is necessary to use mechanical equipment during the construction process. At the same time, in order to promote the effective use of mechanical equipment, it is necessary to strengthen equipment management and maintenance. 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 systems, etc. As the number of highway projects continues to increase, people's living standards continue to improve. Under such circumstances, it is undoubtedly of great practical significance to strengthen the management and maintenance of mechanical equipment and improve the level of management and maintenance. Although the construction unit currently pays attention to management and maintenance work, because the relevant systems are not strictly implemented, some staff members have a weak awareness of management and maintenance responsibilities, resulting in management and maintenance still having defects and deficiencies. It is necessary to further improve and perfect measures to prevent construction machinery equipment from being damaged. To prevent quality and safety accidents, reduce unnecessary losses, ensure construction progress, and improve highway project construction efficiency.

1. Frequently Asked Questions about the Management and Maintenance of Highway Engineering Mechanical Construction Equipment

Mechanical equipment management and maintenance are important tasks in highway engineering construction. Doing this job well can ensure that the mechanical The equipment is in good performance to achieve effective prevention of quality and safety accidents. It also promotes the improvement of the management and maintenance level of mechanical equipment, promotes the effective implementation of various institutional measures, and improves the responsibility awareness of management and maintenance personnel. It can also nip equipment failures and safety accidents in the bud, avoid unnecessary losses, ensure construction progress, and promote the improvement of highway project quality.

1.1 Insufficient ideological attention

Some construction units focus on market expansion, accelerating construction progress, and improving project construction efficiency. There is not enough emphasis on the management and maintenance of mechanical equipment, and effective management and maintenance measures cannot be taken based on specific needs. The management and maintenance system is not strictly implemented. The corresponding investment in funds and equipment management and maintenance is insufficient. There are few management and maintenance personnel, which restricts the smooth construction of construction. It may also cause unnecessary losses to highway construction.

In addition, although highway project supervision plays a very important role in ensuring construction safety and improving equipment performance, there are also problems and deficiencies. In general, it is manifested in the following aspects: there is no detailed stipulation of the responsibilities and obligations of management and maintenance units and staff, there is no clear status of management and maintenance, its functions have not been fully determined, and its role has not been clearly understood, resulting in mechanical equipment management Poor maintenance.

1.2 Management and maintenance measures are not implemented

Although highway construction units generally establish mechanical equipment management and maintenance systems, clear management and maintenance goals, processes and related staff responsibilities. However, due to the weak awareness of responsibility of management and maintenance personnel, these institutional measures were not strictly implemented, and effective mechanical equipment management and maintenance methods were not adopted during construction. It was difficult to detect equipment hazards in a timely manner, which was not conducive to improving management and maintenance levels. In addition, mechanical equipment failure prevention work is not in place. When some construction workers entered the site for construction, they did not strictly follow the specifications for the operation of mechanical equipment. There was insufficient preventive maintenance, insufficient daily inspections and maintenance, and inadequate management and maintenance of the construction site. There were safety hazards, which restricted the effective performance of the mechanical equipment.

1.3 Shortcomings 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 plays an important role in ensuring project quality and construction schedule, and is generally recognized by society. However, these systems have not been effectively implemented and are facing many problems. The management and maintenance of mechanical equipment is facing more problems and more severe challenges. For example, business competition among construction units is becoming more and more intense. With the establishment of management and maintenance systems, the number of construction units is increasing, and business competition among them is intensifying. In this case, construction units have to explore new ways and means in order to occupy a favorable position in competition and promote their own development, and 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, mainly due to lack of professional knowledge, insufficient practical experience, low professional quality, and failure to perform their duties conscientiously, which affects the improvement of mechanical equipment management and maintenance levels.

2. Improved suggestions for the management and maintenance of highway engineering machinery construction equipment

In order to effectively deal with the deficiencies in the management and maintenance of highway engineering machinery construction equipment, combined with the specific conditions of highway engineering construction , the author believes that improvement and improvement measures should be taken from the following aspects.

2.1 Improve the ideological understanding of equipment management and maintenance

Construction units and relevant leaders should improve the ideological understanding of mechanical equipment management and maintenance, and realize that strengthening this work is important for promoting smooth construction. It is of great significance to improve the quality and efficiency of project construction. We will also formulate and improve mechanical equipment management and maintenance measures, increase support in terms of funds and personnel, and lay a good foundation for improving management and maintenance levels.

2.2 Strictly implement various systems for equipment management and maintenance

Based on the needs of highway project construction, improve various institutional measures for mechanical equipment management and maintenance, promote the smooth progress of construction, and promote management Institutionalization and standardization of maintenance. At the same time, it is necessary to clarify the responsibilities of relevant units and staff, strictly implement various management and maintenance system measures, establish a strict responsibility system, effectively implement the system, promote the continuous improvement of the management and maintenance level of mechanical equipment, and improve the comprehensive performance of mechanical equipment. Best play. Pay attention to the management of mechanical equipment and arrange them reasonably to meet construction needs. Pay attention to the application of various testing equipment and testing methods, master the basic situation of equipment operation, and improve the effectiveness of mechanical equipment management and maintenance. Strengthen the inspection of mechanical equipment, carry out on-site inspections and inspections, eliminate existing hidden dangers in a timely manner, and promote the optimal performance of the comprehensive performance of mechanical equipment.

2.3 Clarify responsibilities and improve the quality of management and maintenance personnel

The main responsibilities of highway engineering construction machinery equipment management and maintenance work are: responsible for inspecting and inspecting construction machinery equipment, regularly and irregularly Carry out regular inspections to understand the basic conditions of equipment operation, discover and deal with existing defects in a timely manner, and enable mechanical equipment to operate and function better. To this end, mechanical equipment management and maintenance should run through the entire process of project construction. It is of great significance to ensure the safe and orderly conduct of highway construction work, promote employees to comply with management and maintenance regulations, and ensure the quality and efficiency of highway projects. Based on the actual situation of highway engineering construction, the following measures can be taken to implement management and maintenance measures: introduce and cultivate high-quality management and maintenance talents, and 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 strictly follow rules and regulations to manage and maintain mechanical equipment. Strengthen the construction of management and maintenance teams and establish a high-quality and high-level work team to provide guarantee for improving the management and maintenance level of mechanical equipment. Pay attention to the training of construction personnel to ensure that they strictly follow the specifications and prevent failures.

2.4 Strengthen the management and maintenance of engineering machinery equipment at 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 regulatory requirements, and timely detect and address existing deficiencies. Improve various institutional measures for the management and maintenance of mechanical equipment. In fact, highway engineering mechanical equipment management and maintenance work faces many problems and challenges. Based on these problems and challenges, combined with the actual situation of highway engineering construction, ideological understanding should be improved to ensure that mechanical equipment is in good performance and working condition. Strengthen inspections and inspections at highway construction sites, carry out regular and irregular inspections, and conduct daily inspections of construction machinery and equipment to ensure that the equipment is in good performance and operating condition, which will help ensure construction progress and improve the quality and efficiency of project construction. Establish and implement mechanical equipment management and maintenance measures, promptly eliminate various hidden dangers, and promote the improvement of mechanical equipment management and maintenance levels.

2.5 Optimize the management and maintenance system and focus on dynamic management and maintenance

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

3. Conclusion

The article mainly studies the management and maintenance measures of highway engineering mechanical equipment. Mechanical equipment management and maintenance is a systematic and complex work, involving the engineering In every aspect. During project construction, it is necessary to do a good job in management and maintenance, and pay attention to the effective application of management and maintenance measures. However, there are still many aspects worthy of research and improvement. For example, establishing a management and maintenance early warning mechanism, implementing dynamic management and maintenance, etc. require in-depth research and discussion, and applying them to management and maintenance practices to further improve the level of mechanical equipment management and maintenance.

References:

[1] Cao Lin. Frequently Asked Questions on Management and Maintenance of Highway Engineering Mechanical Construction Equipment [J]. Automobile Maintenance, 2015(2): 2-3.

[2] Zhang Qingjiang. Discussion on the management and maintenance of highway engineering machinery construction equipment [J]. Jiangxi Building Materials, 2016 (3): 202-203.

[3] Cao Minghui . Mechanical Equipment Management in Highway Engineering Construction [J]. Construction Mechanical Technology and Management, 2011(3): 145-47.

[4] Liu Yifeng, Teng Jugen. Mechanical Equipment in Highway Engineering Analysis of maintenance and management issues[J]. China High-tech Enterprises, 2015(6): 119-120.;