catalogue

Chapter one: Introduction.

Part one: internship objectives

Part II: Introduction of internship units.

Chapter 2: Practice process

Part I: Factory orientation.

Part II: Practice process.

I. Visit the forging branch on the morning of July 20th, 2009.

On the afternoon of July 20th, 2009, I visited the gear factory.

Three. July 2, 20091Visit to Construction Machinery Co., Ltd.

On the morning of July 22nd, 2009, I visited the stamping factory.

On the afternoon of July 22nd, 2009, I visited the heat treatment plant.

On July 23rd, 2009, I visited the second generation factory.

Seven. On July 24th, 2009, I visited the First Assembly Plant.

Eight. On July 25th, 2009, I visited the precision foundry.

Chapter III Internship Experience

Chapter IV References

Chapter one: Introduction.

Production practice is an important part of university practice, and the school attaches great importance to it. Every year, a large amount of funds are allocated to arrange students of various majors to visit and practice in various factories, so that students can increase their knowledge, consolidate their textbook knowledge, let us know some basic operation processes of the factory, and lay a solid foundation for future study and work.

Of course, our major is no exception. Before the start of school, the school arranged for our professional students to take part in production practice from 10 to 12 weeks, so more than 200 of us, led by our teachers, excitedly visited Luoyang for practice, which made us learn a lot.

Through my own visit, I also searched all kinds of books and related materials online, consolidated and improved my knowledge, and successfully completed this internship report. Therefore, the content of this report consists of four chapters.

Part one: internship objectives

The important goal of this internship is to enable students to acquire perceptual knowledge of basic production, integrate theory with practice and expand their knowledge; At the same time, professional practice is an important channel to temper and cultivate students' professional ability and quality, and to cultivate contemporary college students' hard-working spirit. It is also an important way for students to get in touch with society, understand the industrial status and national conditions, gradually realize the transformation from students to society, and cultivate our ability to undertake technical work initially and understand the basic methods and skills of enterprise management. Experience the contents and methods of enterprise work. This practical knowledge is a very necessary basis for us to study the follow-up courses and even work in the future. In this practice, we should do the following: 1: Through the production practice in different places, we should go deep into the first line of production to investigate and investigate, and gain the necessary perceptual knowledge, so that students can fully understand the production organization and production process of machinery factory, understand and master the basic production knowledge of this major, consolidate and deepen the theoretical knowledge they have learned, and lay the foundation for the teaching, curriculum design and graduation design of subsequent professional courses. 2. During the internship, through the analysis of the processing technology of sample parts and the process equipment such as machine tools, fixtures and measuring tools used in the processing of parts, the theoretical knowledge is combined with practice to analyze and solve problems. 3. Through internship, I got in touch with workers extensively, listened to the special reports of workers' technicians, and learned about their experiences in the production of good monks, skill reform and scientific research achievements, as well as their contributions to the four modernizations. 4. By visiting related factories, you can control the whole production process, organization and management, equipment selection and workshop layout of a machine and expand your knowledge. 5. By writing an internship diary and an internship report, you can temper and cultivate your ability to investigate, analyze problems and collect and sort out technical data. Second, the internship content (1) understands the production process, production line layout and technical equipment of the factory; (2) Record the design and manufacturing process and equipment of parts; (3) Knowledge and methods of controlling machining process (4) Tool knowledge, familiar with the structure, selection and use of commonly used tools (5) Knowledge of machine tools and CNC systems, especially CNC equipment such as machining centers (6) Knowledge of enterprise production management mode, learning advanced management methods (7) Familiar with and consolidate the knowledge of casting technology and equipment, and consolidate the theoretical knowledge we have learned. More is to let us learn what we can't learn in textbooks and increase our knowledge. During the practice, we learned some basic operation processes of the factory, got a preliminary understanding of the machine tool structure, processing methods and clamping methods, and got a more detailed understanding of the processing technology of some parts, which laid a good foundation for future work. Of course, it is more important for us to consolidate the theoretical knowledge we usually study and know how much equipment we have really learned to supplement our own shortcomings.

Part II: Introduction of internship units.

China Yi Tuo Group Co., Ltd., headquartered in Luoyang, a famous historical and cultural city in China and the ancient capital of the Nine Dynasties, is the only agricultural machinery manufacturing and sales enterprise in China listed in Hong Kong. Its predecessor, Tractor No.1 Factory, is a comprehensive company which mainly produces machinery and has factories, subsidiaries and representative offices in many regions at home and abroad.

1955, as one of the key construction projects 156 aided by the former Soviet Union during the "First Five-Year Plan" period of new China, Yi Tuo, the largest tractor factory in China, broke ground in the Royal Garden of the former Yang Di Emperor in Jianxi, Luoyang under the instructions of President Mao Zedong. After three years of construction and improvement, the first tractor was towed off the assembly line on July 20th 1958. 1 959165438+1October1,officially completed in Yi Tuo. 1990 was rated as "national first-class enterprise" by the State Council Enterprise Management Committee. 1997, China Yi Tuo group reorganized its tractor-related business, assets and debtors, followed the shareholding system reform, and established First Tractor Co., Ltd. according to law. After that, the joint-stock company issued H shares overseas and listed in Hong Kong on June 23rd of the same year. 1999 "Dongfanghong" trademark was recognized as a well-known trademark in China by the State Administration. In 2003, "Dongfanghong" brand tractors (crawler and wheeled), industrial bulldozers and "Luoyang" brand road rollers won the title of "Famous Brand Products in Henan Province". June 5438+October 2000 10, the company passed the ISO 9002: 1994 quality management system certification as a whole, and passed the ISO 9001:2000 quality management system certification as a whole in May 2003. At present, in order to further meet the needs of production and market development, the company has fully implemented the standard of situational/occupational health and safety management system in the company since 2004, ensuring that it passed the third-party certification in the first half of 2005, and established a quality management system based on ISO900 1, which is organically combined with ISO 1400 1 and OHSMS management systems. After years of development and changes in market conditions, Yi Tuo has also embarked on the road of product diversification. At present, its products mainly include the following four categories:

1. Agricultural machinery: high-power wheeled tractors, high-power crawler tractors and small and medium-power wheeled traction combine harvesters.

Power machinery: diesel engine and press.

Three. Construction machinery: rollers, industrial bulldozers, forklifts, excavators and cranes.

Cars: all kinds of trucks, transport vehicles, sprinklers and other products.

Now, starting with the mechanism and system, Yi Tuo is actively establishing a modern enterprise system. We will actively explore capital management by means of joint venture, shareholding system reform, lease contract and liberalization of operation, and strive to move forward to a modern enterprise group with cross-industry, cross-region, cross-ownership and transnational operation, and gradually establish adaptation.

Chapter 2: Practice process

Part I: Factory orientation.

The so-called safety education is important. On the first day we arrived in Luoyang, we were organized for safety education, and the staff in Yi Tuo explained the safety education to us. Since primary school, students have been ignoring the safety education that teachers will emphasize every time they travel, unless teachers take the initiative to intervene. However, this time, the staff let us thoroughly and truly experience the bloody tragedy behind the accident and fully understand the importance of safety in the factory. Its security persecution can be divided into six categories:

1. Mechanical persecution, mainly mechanical persecution.

2. There are two kinds of chemical persecution: gaseous persecution and liquid persecution.

3. The persecution of burning and explosion is mainly the joint action of machinery, chemistry and thermal effect.

4. Hot persecution.

5. electric shock persecution.

6. Other persecution.

And the only measure to put an end to these security persecution is to strictly abide by the safety requirements of the factory, and its important preventive measures are:

1. Smoking is strictly prohibited in any area of the factory;

2. You must queue up to enter the factory;

3. No assembly in the square;

4. Cover the garden and take good care of flowers and plants;

5. Do not block the entrance and exit of the factory, and do not stand on the main road of the factory;

6. Keep the factory clean;

7. It is forbidden to take pictures in the factory;

8. Alcoholism is strictly prohibited during production practice;

9. Dress according to the uniform requirements. It is forbidden to wear slippers, sandals and high heels into the factory. Pants are required. The cuffs and collars of the clothes are buttoned. People with long hair will put their hair in a hat and can't carry a backpack into the factory.

10. The factory belongs to the production organization and strictly abides by all kinds of machine tools, but only takes a look;

1 1. Due to the splashing of machine tool oil lubrication, the road surface is slippery, so pay attention to anti-skid when entering the factory;

12. It is forbidden to listen to MP3 while walking after entering the factory;

13. Pay attention to the image of yourself and the school;

14. No spitting;

Part II: Practice process.

First, visit the forging branch.

1. Overview:

The professional forging base was completed and put into operation on 1959, with an annual production capacity of 35,000 tons and more than 800 kinds of forgings. There are 3 production lines for large forgings (crankshafts) and 3 production lines for small crankshafts 1, and a hanging heat treatment and tempering production line with advanced domestic level has been built. Before the introduction, we have established cooperative relations with more than 30 domestic manufacturers, which can provide users with high-quality forgings, such as agricultural machinery, construction machinery, power machinery, military foreign trade and so on. The forging weight is 0. 1 kg ~ 270 kg. In recent years, advanced Japanese technology has been introduced, and a variety of crankshaft series forgings have been developed, especially the hammer forging technology and forging quality of large and complex crankshafts are at the leading level in China. Some products are processed and exported to the United States and Southeast Asia. In terms of product quality, we always aim at customer satisfaction and ensure "high-quality products, excellent services, meeting requirements and continuous improvement", which is a reliable guarantee for enlightening and occupying the market.

2. Production equipment and its functions:

1) workshop 1:

Important equipment is heat treatment furnace, including continuous normalizing furnace and continuous tempering furnace; Forging cold straightening equipment: hydraulic press and straightening hammer are very important, and their important role is to eliminate product deformation caused by forging stress release during heat treatment; Forging cleaning equipment, especially shot blasting machine or shot blasting machine, plays the role of cleaning and strengthening forgings, and the surface of cleaned forgings is smooth.

The hardness is relatively high.

2) Seminar 2:

The second workshop has two workshops. In the light forging workshop, there are 7 flat forging machines and 4 forging machines. The die forging workshop has 1 free forging hammer, 4 air forging hammer and 10 steam forging hammer. In addition, there are three kinds of continuous sponsorship equipment: heating furnace, which plays an important role in heating blanks; Press, whose important function is to finish trimming or punching; Thermal proofreading equipment, its important role is to eliminate deformation (what is important is the deformation caused by trimming or trimming or punching).

3. Production process

The general process of forging is as follows:

Blanking -26 production line-forging (heating, trimming, punching and proofreading)-cooling-heat treatment (which may cause deformation of parts)-cleaning (which may also cause deformation of parts)-cold proofreading.

Second, visit the gear factory.

1, overview:

The professional gear and its assembly processing center has 659 sets of important process equipment such as Gleason production line, CNC lathe, Italian CNC hobbing machine, CNC gear shaper and heat treatment production line. Gleason bevel gear production line in the United States has an annual production capacity of 654.38+10,000 pieces. At present, it has gradually become a supplier of gearbox products, automobile products, agricultural machinery products, construction machinery products and operation products.

2. Important equipment:

The radial drilling machine is mainly used for deep hole machining of parts, such as table drilling machine, vertical floor milling machine, semi-active spline shaft milling machine, gear hobbing machine, horizontal rectangular table grinder, multi-tool lathe, straight bevel gear planer, electrical control cabinet and other machine tools. Spiral gear precision cutting machine, machine tool active chip removal machine, slot machine.

3. Important products:

1), spur gear, helical gear, straight bevel gear, spiral bevel gear, involute spline and rectangular spline.

The machining field is: Dmaxx 1250 m 15, the accuracy is 6, and the gear with Dmax×800 m 16 can be ground. Can be used in agricultural machinery, construction machinery, diesel engines and other industries.

2), roller series gearbox assembly, harvester gearbox assembly, milling machine gearbox assembly, hydraulic excavator gearbox assembly, loader gearbox assembly and 140, 145, 153 differential assembly and bridge.

In the afternoon, we visited Yi Tuo Gear Factory. The master in the factory told us about the factory, and then we went into the workshop. Pay attention to safety when you come here. All kinds of lathes and machine tools are rotating at high speed, which is very dangerous. We should be very vigilant. Here, we really came to a gear kingdom. There are all kinds of gears, and you can see all kinds of gears that can only be heard in books but not seen, which makes my understanding of gears more comprehensive and specific.

Three. Visit construction machinery co., ltd.

1, overview

This company is a joint venture between China No.1 Tractor Co., Ltd. and Brilliance China Machinery Holding Company. The company covers an area of 6.5438+400,000 square meters, with a building area of 98,000 square meters. Founded in the 1970s, the company was formerly a heavy-duty military enterprise of the Ministry of Machinery Industry, with large production scale and strong technical force. Since its establishment in 1993, the joint venture company has continuously developed cost-effective construction machinery products that meet the national conditions and market demand by virtue of the scientific research capability of military technology.

2. Important products:

There are dozens of models in three series: wheel loader, industrial bulldozer and vibratory roller, among which Dongfanghong T 100 industrial bulldozer was rated as a provincial high-quality product. As a well-known "Dongfanghong" construction machinery product at home and abroad, it sells well in 30 provinces, municipalities and autonomous regions, and is exported to Europe, Asia, Africa, Latin America and Australia. The company has always adhered to the policy of "quality first, customer first", passed the 1S0900 1 quality system certification, and was awarded the honorary titles of "May 1st Labor Award", "Top Ten Units in Professional Ethics Construction" and "Excellent Foreign-invested Enterprise" by provinces and cities for many times. The transformation from military production to construction machinery production. The company has always maintained the enterprise spirit of "inheriting military morality and striving for first-class industry". With a good foundation and strong strength, based on the market, we have developed three series of products: wheel loader, crawler bulldozer and vibratory roller.

3. Important equipment:

The company not only owns more than 50 large-scale, precise and rare advanced equipment manufactured by well-known enterprises at home and abroad, but also owns more than 400 important processing equipment, such as CNC gas cutting machine, roller press, spot welder, float car, double shearing machine, boring machine, gantry planer, vertical lathe, single-arm planer and other large machine tools. In addition, we have international advanced testing instruments in measurement and testing, which provides a reliable guarantee for product quality.

4. Introduction to the seminar:

The company has five workshops:

Workshop 1, structural workshop, responsible for blanking;

Workshop 2, riveting workshop, is very important for welding all parts;

Workshop 3, machining workshop, is very important for the processing of parts;

Workshop 4, painting workshop, mainly used for spraying products;

Workshop 5. Assembly workshop is very important for assembly;

5, parts paint processing flow:

Derusting (shot peening is very important)-first spraying (primer spraying)-drying-second spraying (topcoat spraying)-drying-final painting-experiment (divided into road test and load test)-water washing-drying-final packaging-product delivery.

Fourth, visit the stamping factory.

1, overview:

Flaig Body Co., Ltd. was established in 1956 in February 2006 on the basis of the original stamping factory of China Yi Tuo Group Co., Ltd. Flaig Company inherited the important business of the original stamping factory, and devoted itself to the production and sales of covering parts, structural parts, cabs, fuel tanks and other products of automobiles, agricultural machinery and construction machinery, as well as stamping, welding, painting and machining of general mechanical products. The general production process of wall parts is as follows. Game parts need some processing to meet our design and application requirements. How to add some processing steps to these parts? In each process, we also need to design more reasonable processing steps according to the processing requirements. For example, these thin-walled parts are generally forged by thin film to improve production efficiency and accuracy. Therefore, it is very important to design a good die during cold forging. In the subsequent processing, these thin-walled parts need to be fixed and positioned. In order to achieve higher machining efficiency, we need to design a good fixture. I will analyze the fixture in detail later.

2, workshop equipment and production products:

Material preparation workshop: there are more than 20 shearing machines and rust removal and pickling production lines. It is important to prepare the blank for the next process. Stamping Workshop 1: There are double-acting 630-ton mechanical presses, single-acting 800-ton and 630-ton mechanical presses, which mainly produce various types of cab covers, box-shaped deep-drawn parts and plate stamping parts; Stamping workshop 2: single-acting four-point1000t mechanical press, single-acting single-point 2000t mechanical press, double-acting1300t stretching press and double-acting1000t press. Its products are mainly oversize sheet parts, such as door panels, floors, ceilings, dashboards and other large stamping parts. Welding workshop; 150 ~ 200 kW spot welding machine, rotary spot welding machine, oil tank sealing spot welding machine and other arc welding machines are very important for welding and assembling parts used in various models; Paint shop; Cathode electrophoresis machine, self-propelled reed control machine controlled by single chip microcomputer, assembly process of parts and alloy parts, phosphating treatment of degreasing surface by double process, etc.

3, process flow:

The technological process of stamping factory is: material preparation area-stamping-welding-painting-final assembly-finished product.

Verb (abbreviation for verb) Visit Yi Tuo Heat Treatment Plant.

1, overview:

The heat treatment plant is a professional factory established on the basis of integrating the heat treatment resources of Yi Tuo Company, which was established on February 26th, 2002. Having fixed assets of more than 73 million yuan; Production area14916m2; More than 370 sets of various equipment. It has many years of supporting production history for tractors, automobiles, construction machinery and power machinery. In the production of heat treatment processes such as carburizing, nitriding, carbonitriding, induction quenching, tempering, normalizing and annealing, as well as surface oxidation, phosphating and electroplating, a crankshaft quality centering machine with international advanced level has been established. Objective with rich and mature experience in technical management, that overall annual production and proces capacity exceeds 20,000 ton.

2. Equipment and efficacy

Double row furnaces are mainly used for carburizing and quenching. The sponsor material methanol is carburizing agent and acetone is protective gas. Shot peening machine is mainly used to promote the surface compressive stress of parts and improve the surface quality of products; Straightener is mainly used to correct the deformation of parts caused by heat treatment and shot peening.

3, heat treatment process:

(a) gas heating gas carburizing furnace

Quenching medium: gasoline

Preheating temperature: 900℃

Carburizing temperature: 920℃

Strong permeation temperature: 920℃

Diffusion temperature: 900℃

(2) Electric heating gas carburizing furnace

Propane+shielding gas

Quenching medium: gasoline

Tempering at low temperature of 200℃ after quenching.

Pressure cooling after quenching can prevent deformation.

Covering the atmosphere: methanol and acetone

Low-voltage proofreader: reduce deformation

Shot blasting machine: improve the surface appearance of workpiece and improve the surface hardness.

Raw gas: carbon monoxide, methane and nitrogen.

Preparation process: propane and air → mixing and pressurizing →/kloc-reaction above 0/000℃ → rapid cooling → sending into carburizing furnace as protective atmosphere after the components are qualified.

4, internship summary:

Carburizing improves the surface hardness of workpiece → obtaining hard and brittle martensite.

(1) Fully consider the deformation factor of heat treatment, leaving machining allowance.

(2) Avoid designing sharp corners to avoid deformation during heat treatment.

(3) Try to be symmetrical when designing parts.

(4) The opening should be away from the edge of the part.

(5) Before production, process verification shall be conducted. First, carry out small batch production, test the process and make reasonable corrections to avoid unnecessary losses caused by large batch production.

Six, visit the second foundry

1, overview:

During the "Ninth Five-Year Plan" period, the No.1 Iron Casting Plant, which produces iron castings, carried out large-scale technical transformation. The modeling department introduced the static pressure molding line from KW company in Germany, which is the largest iron casting production line in China at present and has the international advanced level in the 1990s. The sand treatment department imported important equipment such as sand mixer, cooler and active moisture control from KN company in Germany. The melting department introduced American coreless frequency conversion induction furnace and used cupola to realize double melting; The core-making department introduced the German cold box core-making machine and installed the domestic furan resin self-hardening sand core-making production line. We have British electronic metallographic microscope, American direct reading spectrometer, German three-coordinate scriber detection instrument, and the design and manufacture of tooling and molds all use CAD/CAE skills. 1999 passed the IS09002 quality system certification. At present, it can produce gray cast iron and nodular cast iron castings of various automobiles and tractors with a single weight of 50-500Kg, and has formed an annual production capacity of 35,000 tons. In addition to the products made in Yi Tuo, China, the four and six cylinders of diesel engines, automobiles and other parts of diesel engines are also matched with several famous domestic automobile manufacturers and diesel engine manufacturers.

2, process flow:

Process flow of sand casting: Features: Generally, it is not limited by the size, shape and complexity of parts, and the molding materials are widely available, low in cost and widely used. According to the molding materials, it can be divided into dry sand mold, wet sand mold, sodium silicate sand mold, resin sand mold and self-hardening sand mold. Process analysis (1. Process parameter 2. Sand core design)-making sand core, making sand mold-melting-pouring-unpacking.

Seven, visit the first assembly plant

1, overview

The first assembly plant of China No.1 Tractor Co., Ltd. is the largest production base of agricultural crawler tractors in China agricultural machinery industry. The factory was founded in 1956, covering an area of 55,800 square meters and a building area of 36,600 square meters. It is the backbone professional factory of the first tractor factory, which is one of the key projects in the first five-year plan period 156. Since the assembly of the first 54-horsepower crawler tractor in China was completed on July 20th, 1958, the annual production capacity of 25,000 crawler tractors has been formed. After more than 40 years of development, Oriental Red Card tractors and construction machinery have spread all over China, and have been exported to more than 50 countries and regions such as Europe, North America, South America, Africa, East Asia and the Middle East, which have been well received by users. In the past ten years, we have achieved 15 major technical transformation projects, involving cold, heat, painting, assembly and welding, and built a new assembly line, which further improved the level of technology and equipment and production capacity, and enhanced the competitiveness of enterprises' products. Our factory has a complete set of heat treatment equipment, such as flexible machining line of machining center, gas shielded welding, imported heavy-duty vertical broaching machine, multi-axis active vertical lathe, multi-function controllable atmosphere multi-purpose furnace controlled by microcomputer, bright quenching, numerical control induction heat treatment, gear parts and shaft parts, as well as nearly a thousand modern equipment, such as shell parts, fork parts, shaft parts special production lines and electrostatic coating lines. The newly-built assembly line has high technology content and complete functions. Many new technologies, such as industrial active computer monitoring, online detection, computer monitoring running-in test bench, large screen logistics management, etc., have been adopted. It can realize multi-variety mixed-flow assembly and high-horsepower tractor assembly. The first assembly plant is not only the main engine manufacturer of variant products of crawler tractors and bulldozers of First Tractor Co., Ltd., but also has the ability to improve, develop and sell various variant new products of tractors. There are more than 0/00 senior technicians/kloc, which can adapt to the development and changes of international and domestic markets and the different needs of users. CAD, CAPP and computer network information system (ERP) have been widely used in process design, product development and enterprise management. In recent years, we have independently developed dozens of variant products, such as crawler trailer series, hydraulic excavator series, transport and agricultural wheeled trailer series, special crawler machinery products, etc., which have been well received by users. "Unity, dedication and first-class" is a kind of energy. With the advent of the knowledge-based economy era in the 2 1 century, our factory is willing to carry out extensive technical, product and trade cooperation with domestic and foreign enterprises and scientific research institutions under the principle of equality and mutual benefit, revitalize agricultural equipment, strive for future development, and let the brand "Dongfanghong" spread all over the world in the songs of sing the chinese people.

Eight, visit the precision foundry

1, overview

Investment casting is an important mode of production in this factory. The technological process of investment casting is: making mother mold-making pressing-making wax mold-making shell-dewaxing-baking molding-pouring-shelling. Investment casting has accurate size, smooth surface and no parting surface, so there is no need for machining or less machining. Investment casting has many processes and long production cycle. Due to the strength of the shell, the weight of the casting is generally less than 25kg. Suitable for producing small, medium, thin-walled and complex castings of various metals and alloys. It is very important for our factory to combine the knowledge about investment casting learned in class with the production here, from which we should be able to see what should be done in mold design.

2. Production process

The production process basis of investment casting is as follows:

1) mold making, and 2-3 molds are alternately applied to make wax molds.

2) repairing, assembling and trimming the wax pattern, and putting the wax pattern on the wax rod to form the wax pattern.

3) making a template, and repeatedly processing with water glass, quartz sand and ammonium chloride water to form a template of about 8 mm ..

4) Dissolve the wax and soak it in 95℃ hot water to dissolve the wax.

5) The template is burned to 860-950 degrees with a gas stove for 2-3 hours.

6) cooling, cooling to 600 degrees.

7) pouring.

8) Cleaning: shell and rod are respectively cracked by a vibrator, and the castings are cleaned by a roller, sodium hydroxide solvent and shot blasting machine.

9) Heat treatment: normalizing, tempering and other processes.

10) clean the oxide film and clean it with a shot blasting machine.

1 1) Inspection and deburring (grinder).

12) magnetic particle detection: magnetize with a magnetizer, put it in magnetic suspension, check whether there are cracks on the surface with a yellow lamp machine, and finally demagnetize with a demagnetizer.

3, process flow:

The technological process of investment casting is as follows: making mother mold-making pressing-making wax mold-making shell-dewaxing-baking modeling-pouring-shelling.

Chapter III: Internship Experience

Through this production practice, I have a lot of feelings and a profound understanding. Before going, I always thought that we should have a deeper understanding of the production situation of the enterprise according to the knowledge learned in books and classes. But after I went there, I didn't know how naive my thoughts were, and I understood the true meaning of "knowing what is difficult" in the book, and I also understood that the teacher wanted us to go to the factory for internship. There are many devices that seem to have been understood, but in reality it is another situation. Sometimes you think that the equipment you control may be only a superficial or whole aspect, or even a faulty knowledge. Without on-site assessment practice, these problems cannot be created. The experience of this production practice is summarized as follows:

1, which expanded my knowledge and made a good supplement to the theoretical knowledge of books;

2, really down-to-earth into the key areas of factory production to understand the production process, understand the factory, understand the equipment;

3. Lay a solid foundation for the study of professional knowledge and lay a foundation for the study of professional courses in the future;

4. A thorough and comprehensive understanding of the professional orientation of this major will play a guiding role in future work;

5. I have a deep impression on the production equipment from perceptual to rational cognition;

6. Have a more comprehensive understanding of the relationship between workshops, resource allocation, production lines and the role of corporate culture in enterprise development;

7. Bad working conditions encourage me to study harder and prepare for better competition in the future;

8. The concept of people-oriented Scientific Outlook on Development is going deep into enterprises, and the concept of humanized management is also going deep into employees;

9. Self-worth can also be realized in ordinary jobs. There are many such examples in Yi Tuo;

10. In the future, we will further improve our comprehensive quality and improve our living structure by combining the school's "Three Doing" concept.

As college students in the new era, especially in this special era, the global financial crisis has brought unprecedented challenges and difficulties to college students' employment. We are about to graduate, facing the big situation, there are not many measures we can take except helplessness. However, I think there are opportunities before the crisis. We often only see the crisis and ignore the opportunities. I think that in the face of suffering, we college students should do their own jobs, practice basic skills, do things honestly, and study diligently. First, we should learn the theoretical knowledge of textbooks well, and learn and understand it. After that, you can use your spare time to combine practice to understand theoretical knowledge and combine theory with practice. Of course, the school has also created many premises for us, such as understanding practice, this production practice. Every internship brings us great benefits and lays a good foundation for the study of textbook theory. Of course, the most important thing is to rely on yourself.

Chapter Four: References

1, edited by Zheng Mingxin of Zhong Wang. Mechanical Engineering Materials Tsinghua University Publishing House.

2. Editor-in-Chief Hu Gengxiang Rong Yong. Fundamentals of Materials Science Shanghai Jiaotong University Press

3. Editor-in-Chief Qu Huachang. Plastic molding technology and mold design higher education press.

4. Editor Liu. Basic principles of material forming Hefei University of Technology Press

5. Editor Zhao. Fundamentals of dynamic skills in mechanical manufacturing Huazhong University of Science and Technology Press.

6. Editor-in-Chief Zhao Changsheng. Handbook of mold materials and heat treatment machinery industry press.

7. Geng Haoran. Zhang Xisheng. Chen Junhua. Cast steel chemical industry press.