Yituo Internship Report

YTO Internship Report 1

1. Internship Location

China YTO Group Co., Ltd.

2. Company Profile China YTO The company is the factory site decided by Chairman Mao Zedong personally and the factory director personally appointed by Premier Zhou Enlai. It is the birthplace of China’s first tractor, first road roller and first military off-road vehicle. ?Dongfanghong? - This resounding name reflects the joy of farmers in New China.

After more than fifty years of development, China YTO Company has become a large-scale comprehensive equipment manufacturing enterprise group with agricultural equipment, engineering machinery, power machinery, automobiles and parts manufacturing as its main business. Among the company's many products, high-power wheeled tractors, crawler tractors, non-road medium-bore diesel engines, rural engineering machinery and other products have the largest market share in the country; products such as road rollers, small and medium-power wheeled tractors, etc. have the leading market share in the country. Top three.

III. Internship time

August 9, 20xx to August 21, 20xx

IV. Purpose and requirements of the internship

(1) The purpose of production internship

Production internship is an important practical teaching link arranged according to the teaching plan of this major. Its purpose is to enable students to understand and master the basic practical knowledge of production in this major, to confirm and consolidate the professional knowledge and other relevant knowledge they have learned, to cultivate students' ability to integrate theory with practice and preliminary independent work, and to lay a solid foundation for subsequent professional courses. Base.

(2) Requirements for production internship

1. Process aspects

Under the guidance of factory technicians and teachers, read process documents and compare and understand on-site Meet the following requirements:

1 Be familiar with various process methods of mechanical processing, and be familiar with the process flow of parts from blank to finished product.

2 Be familiar with the process of two typical parts (shaft and box) (including how to formulate process cards, how to determine the size of each process, selection of machine tools, selection of positioning benchmarks, fixtures, cutting tools, measuring tools, etc. ), requires careful analysis of each process according to the process card.

3 Be familiar with a typical fixture and be able to draw a sketch of the final assembly of the fixture.

④ Participate in certain assembly work, be familiar with various assembly methods, and understand the requirements for designers to achieve assembly accuracy.

5 Understand various special processing methods, such as electrical machining, various super-finishing machining, etc.

6 Be familiar with the measurement methods of various mechanical quantities in the factory (such as length, outer diameter, rotation speed, torque, gear measurement, etc.)

2. Design aspects

Under the guidance of factory technicians, meet the following requirements through on-site visits, reading drawings, or disassembly and assembly of mechanisms:

1 Understand the basic procedures of the overall and component design of a typical machine tool (or some kind of special machine) .

2 Be familiar with the working principles and basic structures of various typical mechanical structures, such as: various transmission and control mechanisms, interlocking mechanisms, typical molds, etc.

3 Understand the structure of typical mechatronic machines and be familiar with mechanical, electrical, pneumatic and hydraulic control and execution systems.

V. Schedule

1. First Power Machinery Co., Ltd. in the morning of August 9th

2. Yituo Forging Branch in the afternoon of August 9th

III. The third assembly plant in the morning of August 10th

IV. The gear processing plant in the afternoon of August 10th

V. The morning of August 13th Tuo Casting Company

VI. Yituo Heat Treatment Plant in the afternoon of August 13th

VII. Introduction to crankshaft manufacturing process in the morning of August 14th

VIII. August Luoyang LYC Bearing Co., Ltd. on the afternoon of the 14th

9. CNC Machine Tool Factory on the morning of August 15

10. No. 1 Assembly Factory on the afternoon of August 15

11. YTO Engineering Materials Research Institute in the morning of August 16th

12. Second Tractor Factory (small tractor) in the afternoon of August 16th

13. August 17 CITIC Heavy Industry (did not visit) on the morning of August 14th.

14. Lecture on gear processing technology in the afternoon of August 17th

15. Lecture on the application of CNC technology in the morning of August 20th

>

16. CITIC Heavy Industry Power Plant in the afternoon of August 20th

17. Public welfare lecture on heat treatment in the morning of August 21st

18. In the afternoon of August 21st Yang Motorcycle Factory

6. Internship content

1. Factory education

1.1 Visit the Dongfanghong Farming Museum

China YTO Exhibition The museum mainly displays some products of Yituo and relief sculptures related to farming. In the YTO exhibition hall, we can see: history and cultural relics related to farming; steam tractors; agricultural machinery and related objects in the early days of New China; some new and old products of China YTO and various related materials of China YTO. Through the lecturer's introduction, I had a greater understanding of my country's farming history and the development history of tractors. At the same time, I also had an in-depth understanding of the history, development, current situation and products of YTO.

1.2 Safety Education

Location: Conference Room on the Second Floor of Yituo Internship Reception Office

Safety Education showed us production safety records and accident cases, some The precautions and bloody cases are terrible. These bloody cases have sounded the alarm for people! The safety hazards can be divided into six categories:

1. Mechanical hazards, mainly mechanical hazards .

2. Hazards from chemical substances, including gaseous and liquid forms.

3. Combustion and explosion hazards, which are mainly the combined effects of mechanical, chemical and thermal effects

4. Thermal hazards.

5. Electrical hazards.

6. Other hazards.

The only way to eliminate these safety hazards is to strictly abide by the factory's safety requirements. The main precautions are:

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

2. You must queue up to enter the factory area and branch factories;

3. Protect gardens and care for flowers and plants;

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

5. Maintain environmental hygiene in the factory area;

6. Photography is strictly prohibited in the factory area;

7. Drinking is strictly prohibited during production internship;

p>

8. It is forbidden to wear slippers, sandals, and high heels into the factory. Long pants are required, and the cuffs and collars of clothes should be tightly buttoned. Those with long hair should put their hair into a hat. Backpacks are not allowed into the factory;

< p>9. The factory is a production organization, and the various machine tools in it are strictly observed and cannot be touched;

10. Due to the splash of machine tool oil lubrication, etc., the road surface is slippery, so you should pay attention to anti-skid when entering the factory; < /p>

11. Pay special attention to the vehicles driving in the aisle and the overhead crane

12. Process documents can be read, but the position cannot be moved, let alone copied

< p>　13. You can ask questions if you don’t understand anything, but it is absolutely forbidden to do it privately

2. Forging factory

2.1 Introduction

Specializing in the production of various types of forgings parts, crankshaft parts rely on one of its forging companies, which has a lot of large-scale forging equipment. After entering the factory, we first listened to some general introductions and understanding of the factory from the staff

The basic process of forging production was introduced, and some safety common sense and requirements for entering the forging plant were emphasized again, and then a safety helmet was worn to enter the production workshop for a visit.

Most of the bars in the forging plant are 45 steel, with diameters ranging from 20mm to 3000mm and lengths of 6m. Equipment includes: shears, saws, steam hammers, presses, flat forging machines, hot die presses, roll forging machines, air hammers, electric furnaces, gas furnaces, etc. Hardness testing needs to be performed before and after heat treatment. The main equipment for hardness testing is the Brinell hardness tester. After heat treatment, there will be black oxide scale, which needs to be cleaned by shot blasting machine. After removing the oxide scale, inspection and deburring can be done. Magnetic particle inspection is used to check whether there are cracks on the surface of parts. The method is to pour the magnetic suspension into the magnet for magnetization, check whether there are cracks under fluorescence, and finally demagnetize.

2.2 Production process

The process flow chart is as follows:

Blanking (including shearing and high-speed band saw cutting)? 26 Production lines? Medium frequency induction heating forging (heating at 1150 degrees Celsius)? Hammer forging (i.e. preforming, drawing, flattening, clamping)? Initial forging? Final forging? Cooling? Trimming, pressing, punching? Forging Post heat treatment (quenching, tempering, normalizing, which may cause deformation of parts)? Cleaning (shot blasting, charcoal burning, which may also cause deformation of parts)? Cold correction

　2.3 Main products

p>

One of the main products of the forging plant is the crankshaft. The crankshaft is one of the three major parts of the engine. Due to the working nature of the crankshaft, its working condition is to withstand periodic alternating stress, so the crankshaft was selected When choosing materials, the requirements for strength, stiffness, and wear resistance are very high. Considering economy, we choose selected No. 45 steel, whose carbon content is 0.42%-0.47%. For high-power engines such as supercharged diesel engines with large compression ratios and strong output power, the crankshaft force will play a greater role, so the material is 42CrM.A.

3. The third assembly plant

3.1 Introduction

China YTO Group Co., Ltd. (referred to as China YTO) is one of the 156 enterprises during the National First Five-Year Plan period. One of the key construction projects, it started construction in 1955 and was completed and put into operation in 1959. It is a very large machinery manufacturing enterprise in China, and its "Dongfanghong" trademark is a "well-known trademark" in China. The company is headquartered in Jianxi District, Luoyang City, Henan Province. China YTO is a factory whose factory site was determined personally by Chairman Mao Zedong and whose director was personally appointed by Premier Zhou Enlai. It is the birthplace of China’s first tractor, first road roller and first military off-road vehicle.

?Dongfanghong? - This resounding name reflects the joy of farmers in New China.

After more than fifty years of development, China YTO Company has become a large-scale comprehensive equipment manufacturing enterprise group with agricultural equipment, engineering machinery, power machinery, automobiles and parts manufacturing as its main business. Among the company's many products, high-power wheeled tractors, crawler tractors, non-road medium-bore diesel engines, rural engineering machinery and other products have the largest market share in the country; products such as road rollers, small and medium-power wheeled tractors, etc. have the leading market share in the country. Top three.

In 2013, the State Council announced the seventh batch of national key cultural relics protection units. The Soviet-style architectural complex in Jianxi, Luoyang, built with Soviet aid in 1954, was selected as an important historical site and representative building in modern times. In May 2011, the block where these Soviet-style buildings are located was rated as a "Famous Historical and Cultural Street in China" and was the only industrial heritage street selected among the top ten famous streets in the country.