Summary is to analyze and study the relevant situation at a certain stage, and make a written material with guiding experience, methods and conclusions. Writing summary is conducive to improving our learning and working ability. It is better to act immediately and write a summary. How to focus on the summary? The following is a summary of my internship in mechanical and electronic engineering. Welcome everyone to refer to it, I hope I can help you.
Summary of mechanical and electronic engineering practice 1 This semester is mainly about visiting factories, and some concepts of mechatronics are also mentioned in the theoretical class. We visited Hangzhou Thermal Power Plant, Hangzhou Wahaha Group and Hangzhou Digital Source Technology Co., Ltd., which are typical enterprises in the application of electromechanical technology.
First, the contents of the visit and the understanding of mechanical and electrical equipment
1, Hangzhou Thermal Power Plant
On the afternoon of August 2nd, 20xx, we visited Hangzhou Thermal Power Plant under the leadership of technical workers from the thermal power plant. Hangzhou Thermal Power Plant is the earliest energy-saving enterprise of central heating and cogeneration in Zhejiang Province. From 1984 to 199 1, it has developed to the scale of three furnaces and three machines, with an annual heating capacity of 4 1 70,000 Ji Jiao and a power generation capacity of1. 700 million kWh, and the maximum steam supply per hour reached 279 tons. Hangzhou Thermal Power Plant mainly supplies heat and generates electricity at the same time. After put into operation, the advantages of central heating have been brought into play. By the end of 199 1, it has saved 600,000 tons of raw coal compared with small boilers with decentralized heating. As more than 60 small boilers and chimneys were demolished and built, they were replaced by medium-temperature and medium-pressure boilers and chimneys with a height of1.50m.. The high steam temperature and stable steam pressure have greatly reduced the environmental pollution in this area, improved the product quality of heat users, saved users' funds, labor, venues and management energy, and produced remarkable social benefits, which have been well received by heat users, making the number of enterprises applying for steam increase year by year. By 1992, the number of hot users has increased to 59. According to the advanced technology of cogeneration in Hangzhou Thermal Power Plant, the unit consumption of heating and power generation has reached the domestic advanced level, and the economic benefit is obviously higher than that of the same industry in China.
We mainly visited the circulating fluidized bed and thermoelectric control room of the thermal power plant. Walking into the workshop where the circulating fluidized bed is located, we can see pipes of various colors, large and small, intricately and regularly leading to various parts of the equipment. Our greatest feeling is heat. Then the technician who showed us around opened a small opening in the combustion chamber. Looking through the small mouth, we saw the blazing flame. The technician told us that the temperature there is about 900 degrees Celsius, and the temperature in the center of the flame is even higher. Then we came to the control room, where seven or eight computers were placed side by side, mainly used for the control of thermoelectric power. There are several TVs hanging on the wall, from which we can see some important occasions in the production workshop. The technical master told us that this system adopts the control system of Siemens, and the operation is simple. A skilled worker can control the computer for several days, saving a lot of human resources. Then we visited the circulating fluidized bed from all angles. The whole fluidized bed is as high as the grass-roots building, and the temperature around the fluidized bed is relatively high. The technical master told us that there are many measuring points everywhere in the fluidized bed to measure the temperature, pressure and other parameters of the fluidized bed in order to adjust the production. Later, through the communication with the technical master, I learned that this equipment has been technically improved, and the combustion efficiency of coal can reach 89%. Before the improvement, the sulfur bed was ignited from above, and about 30 tons of diesel oil was needed for each ignition. After the improvement, it is ignited from below, and only about 3 tons of diesel oil is needed for each ignition. This shows the important role of technical transformation in production. Finally, I visited the thermoelectric control room of the whole plant. On a vertical flat plate, various device models are densely distributed, and the production situation of all parts of the factory can be reflected on it. There are many cabinets around the control room, and there are all kinds of electric meters hanging in the cabinets, all of which indicate the purpose of each electric meter. Finally, we bid farewell to the master worker and ended our visit to the thermal power plant.
2. Hangzhou Wahaha Group
The second place we visited as an intern was Hangzhou Wahaha Group. On the afternoon of July 3 1 20xx, after several twists and turns, we finally came to Hangzhou Wahaha Group and began to visit Wahaha Group under the leadership of Wahaha staff.
1987, Wahaha's predecessor, the distribution department of school-run enterprises in Shangcheng District of Hangzhou, was established. After the joint venture from 65438 to 0996, the company introduced a large number of production lines with the world advanced level in the 1990s from Germany, the United States, Italy, Japan and Canada. The company has a world-class automated production line, as well as advanced R&D and testing instruments and processing technology for food and beverage. It is mainly engaged in the R&D, production and sales of food and beverage, and mainly produces eight categories of nearly 100 varieties of products, including milk-containing beverages, bottled water, carbonated beverages, tea drinks, fruit juice drinks, canned foods, medical health care products and snack foods, among which bottled water, milk-containing beverages and canned eight-treasure porridge have ranked first in the country for many years. In 20xx, the company realized an operating income of 25.8 billion yuan. Wahaha ranked first in China's beverage industry in terms of asset scale, output, sales revenue, profits and taxes for 10 years, and became the largest, most profitable and most promising food and beverage enterprise in China.
The first thing we visited was the mold production workshop of Wahaha Group, where we finally knew how those beautiful and changeable Wahaha bottles came from. There are all kinds of molds being processed and already processed in the workshop. These molds with peculiar shapes are generally obtained by milling, cutting and grinding. Many workers were busy when we visited, and we were lucky enough to see their working process. We find that their work is quite easy, mainly because of the high degree of automation of the equipment and the few parts that need manual control. In the innermost part of the workshop, there is an isolation room with four pieces of equipment side by side. The staff told us that these pieces of equipment are imported from abroad, with high precision and high price, so isolation is beneficial to their protection. After visiting the mold manufacturing workshop, we came to Wahaha automatic production line, which is also the most amazing part for us. Only a few workers are working in the huge production workshop, which shows the high degree of automation of the production line. We witnessed the whole production process of bottles of Wahaha drinks. Empty bottles with nothing go through the production line, become finished drinks, and then put them into boxes. The whole process is fully automatic and fast, and several workers are only responsible for the removal of fakes and the maintenance of equipment. Finally, the factory gave each of us a bottle of Wahaha drink, ending our visit to Wahaha Group.
3. Hangzhou Digital Source Technology Co., Ltd.
After visiting Hangzhou Wahaha Group, we immediately visited Hangzhou Digital Source Technology Co., Ltd.. Invested and controlled by West Lake Electronics Group Co., Ltd., it is mainly engaged in high-tech digital electronic information and communication products, mainly engaged in digital video and audio products, digital (analog) color TVs, communication equipment, etc. Xiasha Digital Source Science and Technology Information Industrial Park has 1 machine insertion workshop, 16 color TV production line and two set-top box production lines, which are composed of high-speed mounters and automatic plug-in machines. The annual production capacity of digital color TVs and large-screen LCD color TVs exceeds 2 million sets, and the number of digital TV set-top boxes reaches 1 10,000 sets.
We mainly visited the automatic production line of color TV without the explanation of technicians, but this did not affect our visit, because the whole production process was clear at a glance. We see that skilled workers in all parts of the production line are responsible for different processes, some are responsible for assembly and some are responsible for debugging. One by one scattered parts, after the production line, formed the finished TV set. Because each worker is only responsible for a small part of production, their technology is very skilled. Although the automation level of the production line is not high, the production efficiency can still be high.
Second, the understanding of the concept of "mechatronics"
"Mechatronics" is a technology with machinery as the main body, combined with microelectronics technology, especially computer control technology, which runs through the whole design and manufacturing process. Electromechanical integration is mainly composed of mechanical body, power system, sensing and detection system, information processing and control system, actuator and other parts, and each part has different functions. The functions of mechatronics mainly include conversion function, transmission function and storage function, and all parts of mechatronics are completed separately.
Compared with other technologies, mechatronics has many advantages:
1) production capacity and work quality are improved.
Due to the integration of mechanical and electronic technologies, the automation level and accuracy of machinery have been greatly improved, and the production capacity and working quality of machinery have also been improved.
2) Improvement of safety and reliability in use With the improvement of automation level and precision, the manual operation required in the production process is greatly reduced, the possible human operation errors are reduced, and the safety and reliability of machinery are improved.
3) convenient adjustment and maintenance
The whole electromechanical equipment is an organic whole but independent of each other, so when a certain part of the equipment fails or is damaged, only the corresponding part needs to be adjusted and maintained, which is more convenient for the adjustment and maintenance of electromechanical equipment.
4) Multifunctional and widely used.
Mechanical and electrical equipment can be used in the production of different products in the same link, which has great adaptability.
5) Improving working conditions is beneficial to automatic production. In some occasions that are not suitable for human work and production, manual work can be reduced or avoided by automatic equipment, and at the same time, the workload of people can be reduced by automatic production in places suitable for human work, thus improving working conditions and realizing automatic production.
6) Save energy and reduce the loss of raw materials.
Mechanical and electrical equipment can reduce energy consumption and raw material loss by improving equipment and production technology, so as to achieve the purpose of energy saving and emission reduction.
At present, "mechatronics" technology is developing in the direction of high performance, intelligence, systematization, lightweight and miniaturization. In the future production process, mechatronics technology will play an increasingly important role.
Third, personal internship summary
Through this internship, we have a certain understanding of the application of electromechanical specialty in actual production, practical problems that should be paid attention to in production and their corresponding solutions, as well as some advanced production equipment during the internship, and have a deeper understanding of the concept of electromechanical integration. We will begin to study specialized courses next semester. This internship is an introduction to our specialized courses.
Of course, during the internship, we also found some problems. Almost all the advanced equipment in the factories we visited were imported from abroad, such as the control equipment of Hangzhou Thermal Power Plant and the mold production machine tools of Wahaha Group. The purchase and maintenance costs are quite high, which greatly increases the production cost. Therefore, this internship also sounded the alarm for us. While introducing and learning advanced technology, we should also pay attention to the absorption of advanced technology, not just blind application and imitation. We should try our best to design and develop our own.
Summary of mechanical and electronic engineering internship in 20xx 1 1 month, I bid farewell to my alma mater, where I studied for three and a half years, and went to Guangdong Dongguan Yahua Machinery and Equipment Co., Ltd. for an internship with my classmates. In a blink of an eye, the three-month internship period has ended. During my working time, I learned a lot that I couldn't learn at school, paid a lot and certainly gained a lot. In retrospect, it is really bittersweet and full of feelings.
165438+1October 22nd, we arrived at Shengjing Building, where the company is located. Mr. Weng, the marketing manager of the company, greeted us. Under his introduction, I met Mr. Chen, the boss of the company, and my colleagues who will work together in the future. No matter in life or work, they have given me a lot of help, taught me a lot, and made me feel the warmth of the collective family. When I left, I was anxious and started my work trip easily.
I am engaged in SMT industry, that is, surface mount technology, which is a new generation of electronic assembly technology and the hottest technology and process in the electronic assembly industry at present. My main job is the routine maintenance of Yamaha mounting equipment. The mounting equipment required for SMT includes printing machine, inspection machine, high-speed mounter, reflow oven, etc. Among them, the failure rate of mounter is relatively common and needs careful maintenance. Its work scope is mainly monthly maintenance and annual maintenance. The monthly maintenance is mainly to clean the air circuit attached to the machine and the main moving parts of the machine. Annual maintenance is to thoroughly clean the gas path, replace worn or damaged parts, and adjust the accuracy of mounter. In three months' work, through the careful guidance of leaders and the enthusiastic help of colleagues, I have basically understood and mastered the working principle and daily maintenance methods of mounter, and can simply repair its common faults. On this basis, I also read a lot of books about Yamaha mounter, from the development history of the machine to the future prospect; From the basic operation of the machine to the simple handling of faults, it has been greatly improved.
In addition, besides studying Yamaha mounter, I also mastered the daily maintenance of Yamaha printing machine and the basic operation of Kohyoung SPI tester. In the whole mounting process, the quality of printing has a great influence on the quality of the whole substrate mounting, and the detector is an important guarantee for high-quality printing. Wherein, the printing machine grinds the solder paste into micron-sized particles, moves back and forth on the steel screen through a scraper, and prints the solder paste on the substrate; SPI detector comprehensively analyzes the volume, area, thickness and other aspects of solder paste on the pad by using three-dimensional technology, and feeds back the results to the upstream printer and the downstream mounter, thus ensuring the quality of the patch. So the study of SMT technology is another important milestone in my internship.
Good things are fleeting, and internship time is happy and short. In a blink of an eye, I will bid farewell to Yahua Machinery and Equipment Co., Ltd., who has been practicing for three months, and return to my alma mater. I want to say that I am very happy with my three-month internship and I am very happy to work with you and fight for myself and the company together. Here, I would like to thank all the leading colleagues who helped me practice. I believe this valuable internship experience will always accompany me in my future work and life. A journey of a thousand miles begins with a single step. I will cherish this wonderful internship, study harder in my future work and life, and constantly enrich myself.
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