Summary of engineering practice

Summary of Engineering Drawing Training (6 Selected Articles)

Summary is a written material that analyzes and studies the relevant situation at a certain stage and makes instructive experience, methods and conclusions. It can improve our written expression ability, so it is better to calm down and write a summary. How to write a summary is correct? The following is a summary of the engineering drawing training I compiled for you. Welcome to reading. I hope you will like it.

1 is the only source of knowledge, which is really good. Through this internship, I have a further understanding of the major of civil engineering, truly know the difference between theory and practice, stimulate my interest in this major, learn things that books can't learn, accumulate a lot of perceptual knowledge for future courses, lay a good foundation for future study, and imperceptibly improve my knowledge and ability. The internship arranged by the college is really a good opportunity for us college students who are new to this major. In a word, this internship has benefited me a lot.

On the first day of internship, we were full of curiosity. Before we started, we reviewed what we had learned before, and reviewed the related teaching materials such as Introduction to Civil Engineering and Architectural Drawing. We earnestly hope and believe that we can get considerable gains in this internship, and truly do not make dogmatic mistakes and combine theory with practice. The specific internship contents are as follows:

First, visit the laboratory in the college.

The role of the laboratory is to provide a place for structural designers to test the feasibility of their design, which is very important for the safety and reliability of buildings and is also necessary for scientific experiments. In the laboratory, we saw many large experimental instruments. Through the teacher's explanation, we have a preliminary understanding of some experimental instruments and their usage methods, as well as matters needing attention in the use process, including instruments for measuring beam bending and evaluating asphalt performance, as well as universal experimental instruments, quadruple direct shear instruments, portable consolidation instruments and other instruments. Essentially, they provide compressive, tensile and shear stresses to the samples to test their durability, that is, their strength. Some instruments are very advanced, such as those used to measure the tensile strength, compressive strength, torsional strength, shear strength and lightweight consolidation of steel bars in concrete laboratories. Information about stress and deformation is transmitted to related instruments through sensors arranged in the parts, and experimenters can record data and analyze changes to get results! Very convenient. In the laboratory, we also saw some processed workpieces, such as strip cement blocks. In addition, by visiting the laboratory, the teacher vividly introduced several experiments to us, such as pure bending experiment, evaluation of asphalt expansion and softening point experiment, determination of maximum (minimum) dry density experiment of sand and so on.

Through the teacher's explanation, we have a clear understanding of some instruments we usually see on the construction site, their uses, working principles, and problems that should be paid attention to in the process of use, so that we can truly say the names in our mouths and know the requirements in our hearts.

Second, visit the design drawing room and technical research institute.

Drawing is an indispensable and important technical data for building engineering, and all personnel engaged in engineering technology must master drawing skills. If you can't understand the drawing, you can't understand other people's design intentions; If you can't draw, you can't express your thoughts. Therefore, the drawings are called the same language in engineering. It can be seen that the importance of drawings is extraordinary. On this basis, Mr. Kong took out specific drawings and explained in detail the types of drawings, the steps, formats and matters needing attention in drawing drawings. In addition, the process of drawings (design-proofreading-review and modification, etc. ) Give us a detailed introduction. A complete set of drawings shall include: drawing catalogue, general description and standard of drawings, building construction drawings (general plan, plane, elevation, section, details, etc.). ), structural construction drawing (foundation plan, foundation plan, structural plan of each floor, etc.). ), equipment construction drawings, computer drawings, etc. In addition, the teacher also talked about the scope of application of various drawings. Finally, the teacher showed us the graduation design and explained to us the problems that should be paid attention to when doing the graduation design. Finally, I suggest that you study professional knowledge in order to finish your graduation project better.

Through the teacher's explanation, we have a further understanding of the importance of drawings, which brings us closer to this language called world engineering. It laid a solid foundation for us to read pictures correctly in the future.

Third, visit the construction site.

To truly understand civil engineering, we must also contact construction at zero distance, otherwise we can only talk about it. In view of this, we went to the construction site of campus health center and academic exchange center for in-depth understanding. The risk on the construction site is relatively high. So before entering the medical insurance center site, we all brought safety helmets. In addition, in order to ensure the construction safety, the construction site is surrounded by brick walls, and only with the consent of the person in charge can you enter. In addition, in order to ensure the safety of workers, green screens are used around the formwork and support. There is a big sign before the main project, with a list of project managers and their division of labor, as well as civilized construction guarantee system, quality guarantee system, construction layout, etc. The teacher explained to us one by one, and the students actively asked what they didn't understand. Entering the construction area, we saw the main body of the building. There is a large open space in front of the main body for stacking building materials. These materials are mainly steel bars, but there are no building materials such as cement, sand and stone.

We followed the teacher upstairs to listen to the explanation. First of all, we talked about the columns, slabs and beams of the front wall. Then, tell us the types of stairs and the scope of application of each type. When we came to a corner, we saw some iron bars sticking out of the wall. The teacher told us that it was to prevent cracks from appearing between the wall and the main wall. Then the design and treatment methods of construction joints (temperature joints, settlement joints and vibration-proof joints) are realized. There are many reasons for concrete cracks, mainly the change of temperature and humidity, the brittleness and unevenness of concrete, the unreasonable structure and unqualified raw materials (such as alkali-aggregate reaction). In the process of concrete hardening, cement releases a lot of hydration heat, the internal temperature rises continuously, and the surface produces tensile stress. In the later cooling process, due to the constraint of foundation or old concrete, tensile stress will appear in concrete. The decrease of air temperature will also produce great tensile stress on the concrete surface. When these tensile stresses exceed the crack resistance of concrete, cracks will appear. The internal humidity of many concrete changes little or slowly, but the surface humidity may change greatly or greatly. Finally, the teacher talked about roof waterproofing (oily waterproofing and rigid waterproofing) and roof drainage gutter and slope. Finally, the teacher talked about some other problems.

In the academic exchange center, we visited some facilities being renovated on the first floor under the leadership of the project leader, and introduced the characteristics and functions of warm nozzles, central air conditioning, cables, suspended ceilings, alarm control, ventilation equipment, main keels and secondary keels.

Through these internship activities, I feel a lot and gain a lot. As a college student who has just entered the university, I only know a little theoretical things about my major from books, which is almost blank in practice, but after this internship, the situation has changed a lot.

Through my internship, I learned a lot of practical knowledge. The so-called practice is the only criterion for testing truth. By being on standby, I observed the whole construction process closely and learned a lot of applicable and specific construction knowledge, which I seldom contact and pay attention to in books, but it is also very important basic knowledge. I firmly believe that through this period of internship, the practical experience gained will benefit me for life, and will be continuously verified in future practical work. I will continue to understand and appreciate what I have learned in my internship, and continue to apply my theoretical knowledge and practical experience to practical work in my future work and study, so as to fully display my personal value and life value. Strive to realize my ideal and bright future.

I am really pleased with the fruitful results of this internship, but thanks to the strong support of the hospital director, the earnest and responsible teachers and the enthusiastic cooperation of the project leader, I feel you here and thank you for your support!

Summary of engineering drawing training in the next semester of 20xx 17 weeks. Under the guidance of the teacher, our class conducted a one-week CAD drawing training, mainly drawing the device oil return valve on the oil supply pipeline. Through training, you can further master the application of CAD and enhance your hands-on operation ability.

On the first day of training, the teacher first sent us the task book and drawings of all parts, talked about the course arrangement of this week's training, explained the main content, purpose and significance of this week's training, and then explained some details and emphasized some places that should be paid attention to.

In this internship, we have a deeper understanding of CAD. Speaking of its usability, I believe many students feel the same way. We know from books that CAD can draw two-dimensional plane graphics and three-dimensional graphics of machinery, architecture, aviation and petroleum, so it is widely used. Pay attention to the width of lines and the beauty of fonts when drawing graphics. Now with CAD, there is no such problem at all. Thick and thin lines are standardized with "characteristics", which is clear at a glance. The size is also quite accurate. You can enter what you want at the command line, and you don't have to draw it with a T-square on the drawing. It's still not accurate in the end. When drawing straight lines and arcs, the advantages of CAD in size are more obvious. For example, if you draw a circle tangent to a straight line, you can only draw it almost by feeling by hand. Every painting is different and asymmetrical in any way. With CAD drawing, you can catch the tangent point by opening object snap, which is fast and accurate! Dimension marking is even faster. You can complete the marking by dragging two points and clicking the left button. You don't need to draw arrows or mark words. As long as you design your own marking format, the computer can mark papers as required. Inserting text is also convenient. Entering text content in a multi-line text editor can produce absolutely standard national standard characters, which are much more beautiful than our handwritten characters! Roughness, datum symbol, title bar, etc. You can insert it at will without drawing one by one. It's really fast to use! Dimension marking is an important content in engineering drawing. When drawing graphics, only the drawn graphics can't see anything, which is not enough to convey enough design information. Only by marking the dimensions on your own drawings can you make it clear to the viewers. The dimensioning function provided by CAD can express the real dimensions of objects and determine the mutual position relationship, so that viewers can easily and quickly create dimensions in a certain format that meet industry or engineering standards. The dimensioning in CAD includes the dimensioning of linear dimension, angle, diameter, radius, coordinate center of traverse and the dimensioning using Dim command. After setting dimensioning, practical dimensioning commands, editing dimensioning objects with dialog boxes, dimensioning form and position tolerance and quick dimensioning, you can mark various dimensions on text and graphics as long as you understand the above dimensioning.

Finally, the purpose of learning CAD is to complete the related practical drawing tasks and complete the drawing work faster and more accurately in practical work. In this internship, I really learned a lot of practical things, combined with my own learning situation of CAD, I will continue to learn to use CAD, making it a good assistant for my future study and work!

Summary of engineering drawing training 3 Surveying and mapping training is an important practical link of our mechanical design major. During the internship arranged by the school, I insisted on following the teacher's arrangement and completing the daily training tasks as planned.

During the one-week training in surveying and mapping, I went to the studio on time every day to do practical work, and finished my planned tasks every day before leaving school. In surveying and mapping, I have done my own independent, serious and careful operation. When you encounter problems, discuss with other students in the same group and ask other students who know. Through mapping safety valve, I have mastered the methods and steps of part mapping, learned how to use some common tools, and can accurately draw part graphics according to the measured data, further consolidating the relevant knowledge in the process of mechanical drawing, greatly improving my drawing skills, and expressing part graphics more correctly and reasonably on drawings. In the process of mapping the safety valve, I learned the function of some parts and the assembly connection relationship between them.

I find that my drawing skills are not flexible enough in the process of drawing. Sometimes when the front view is complicated and difficult to express, but the top view or left view is simple, I am used to drawing the front view first, which brings trouble to drawing and leads to inefficiency. Through this training, I reviewed and consolidated the basic drawing method of three views, and learned to draw a simple view first, and then complete the other views one by one with the basic drawing method of three views. In the process of mapping graphics, I found that my understanding of cross-sectional view was not clear enough. For example, some graphics are not clear whether to draw lines or not. Through this week's training, I know a lot of my own shortcomings, but I don't know enough about some details in the mechanical drawing course. Textbook knowledge needs further study and special research, and at the same time, it is necessary to review and consolidate the knowledge learned in time.

The spirit of teamwork is reflected everywhere in the training, which makes me feel the strength of the team in my study, and at the same time, I have learned that I must have a rigorous and careful attitude and some patience in my work. The five-day surveying and mapping training is over. During this period, I have paid a lot and gained a lot. Sometimes I feel very tired when I have to work overtime during the day, but the formed drawings are presented to me, which is more joy and willingness than fatigue and irritability. In short, you will get what you pay.

Summary of Engineering Drawing Training Chapter IV Architectural Drawing and Drawing Recognition is a course to learn the basic skills of projection and drawing recognition and to read civil engineering drawings. Architectural drawing recognition mainly studies the basic principle of projection, and the methods and skills of drawing and reading civil engineering drawings. As students majoring in architectural engineering construction, they should master the basic principles of projection and the basic skills of drawing, read the construction drawings of architectural specialty skillfully, accurately understand the design intent, and skillfully use engineering language to exchange relevant engineering technical information with partners.

In the process of architectural drawing recognition, we should combine our usual knowledge, from projection drawing, axonometric drawing, sectional drawing, sectional drawing to plan drawing, elevation drawing and detailed drawing, and familiarize ourselves with every detail of engineering drawing with basic knowledge. Educate students to take the homework of reading pictures seriously, so that professional students can be rigorous, careful and professional. At the same time, we should have imagination and innovation ability. Imagination should go deep into profiles and profiles, and grasp the functions and structures of various buildings. In innovation, we can create a new architectural system and express the latest architectural beauty and artistic beauty. Knowing the map is also the embodiment of the depth of basic knowledge. Here I will make an overview on the basis of reading the picture. It mainly includes projection drawing, profile drawing, profile drawing, building construction drawing, structure construction drawing, etc.

General architectural engineering drawings are formed according to the projection principle and the basic rules of projection drawing, so learning projection knowledge is the basis of learning to read drawings. The principle of projection is that light passes through various points and lines on an object and projects their shadows on the plane where they receive shadows, so that the shadow composition of these points and lines can reflect the outline of the object. Most components in building engineering are composed of plane geometry. According to the projection of plane geometry, the architectural graphics in the drawing can be obtained.

In the process of reading drawings, we can see some features of the building through the projection of its horizontal plane, front plane and side plane. The orthographic projection method is not strong and difficult to understand. At this time, an auxiliary graphic axonometric drawing with strong three-dimensional sense is needed to express it. Orthographic projection and axonometric drawing complement each other, so we can understand the cultivated land map.

In order to express the shape of the object clearly and concisely, we can imagine cutting or breaking the object to get the cross section and section of the object. Among them, the sectional view can express the internal shape and structure of the object, while the sectional view is used to express the sectional shape of a certain part of the object. According to these two points, we can have a clearer understanding of the internal structure of the building.

In life, most of them are civil buildings, which are mainly composed of seven structural parts, such as foundation storage walls or columns, floors, stairs, roofs, floors, doors and windows. These components constitute the main body of the building, and they play different roles in different parts of the building. We are also learning to look at architectural engineering drawings based on civil buildings.

Each building has a complete set of construction drawings. Construction drawings are divided into building construction drawings, structural construction drawings, water supply and drainage construction drawings, electrical construction drawings, etc. Among them, the construction drawing is a drawing used to describe the scale, external shape, internal layout and detailed structure of the building, and it is the main basis for setting out, laying bricks, installing doors and windows, indoor and outdoor decoration, compiling construction budget and construction organization plan. It includes general design description, general plan, building plan, building elevation, building section and building detail. In the construction drawing, some commonly used symbols and legends will be involved, such as index symbols, detail symbols, leaders and so on. They have their own standards and regulations accordingly, so when drawing, we must take Fiona Fang as the standard and use regulations to review and draw. In the construction drawing, various drawings have different forms, uses and contents. We can know the sample drawing and introduce the function and structure of the building as needed.

Summary of Engineering Drawing Training 5 I. Description of Training

Mechanical drawing is a course that pays equal attention to both theoretical teaching and practical teaching, and the practical link is particularly important for the learning and application of the course. After the teaching of mechanical drawing theory, this practical link focuses on the comprehensive training of students' engineering design drawing ability, which integrates design, measurement and manual drawing. Mechanical drawing surveying and mapping skills training is an important link for students to comprehensively use the basic theoretical knowledge and basic drawing skills learned in class. Through surveying and mapping machines or parts, students' organizational management ability, data access ability, hands-on ability and drawing ability are cultivated, and their manual drawing ability is improved. This kind of practical teaching combining theory with practice conforms to the guiding ideology of current higher vocational education and plays an important role in cultivating high-skilled talents.

Second, the purpose of training

Mechanical drawing surveying and mapping skills training, to achieve and complete the following goals:

① Apply and consolidate the theoretical knowledge of this course, understand the general methods and steps of surveying and mapping, cultivate students' preliminary surveying and mapping skills and drawing ability, and lay a preliminary foundation for subsequent professional courses and work;

(2) By drawing sketches, assembly drawings and parts operations, students' practical ability and parts mapping ability are cultivated. Enable students to correctly choose the expression scheme, rationally lay out and draw correctly, and complete the dimensioning and various technical requirements under the guidance of teachers;

③ Understand the assembly process of simple machines. Through comprehensive and systematic training of parts mapping, students' preliminary engineering design ability is cultivated. Familiar with the use of relevant materials (such as national standards, norms and regulations, etc.). ). Initially cultivate the ability to consult standard materials; ⑤ Cultivate students' work style of unity and cooperation and rigorous learning attitude, and enhance their sense of responsibility.

Third, the training requirements

Before surveying and mapping, we should carefully read the surveying and mapping instruction book and make clear the purpose, requirements, contents, methods and steps of surveying and mapping.

(1) In surveying and mapping, students are required to pay attention to cultivating a serious and responsible work style and the habit of completing tasks on time with good quality and quantity. In the process of surveying and mapping, they should review teaching materials, find information and apply what they have learned;

(2) It is required to have original opinions on the expression method of parts, correct view selection and reasonable layout;

(3) Students are required to understand the working principle of the drawn assembly, the functions of each component and the assembly connection relationship between each component; (4) Students are required to draw samples that meet the mechanical drawing standards, and standard parts should be drawn according to standard drawings, simplified drawings or scale drawings, which should be standardized and have correct and complete dimensioning and technical requirements;

⑤ Master measuring tools and accurately measure the external circle, internal hole, center distance, height, depth, length, hole distance, tooth top circle, thread and other related dimensions.

⑥ It is necessary to standardize the training discipline according to the requirements of theoretical classroom teaching, strictly abide by the schedule and attendance system, and incorporate the usual performance of training into the important content of performance appraisal;

All landowners students in the process of surveying and mapping, drawing room should have at least one instructor for on-site counseling and answering questions.

Fourth, the training content

① Disassemble and assemble components correctly and draw a schematic diagram (mark standard parts and materials);

② Draw sketches of all nonstandard parts;

③ Draw the assembly sketch of key parts;

(4) Drawing an assembly drawing according to the assembly schematic diagram and the sketch of the parts;

⑤ According to the assembly drawing and parts sketch, the working drawing of main parts;

⑥ Comprehensive inspection and binding;

⑦ Reinstall the surveying and mapping components;

⑧ Write an internship summary report.

Verb (abbreviation for verb) training institution

Divide the class into groups, with 5-8 people in each group, and each group maps an assembly entity. Each group borrows one assembly surveying and mapping piece (gear oil pump) and two sets of surveying and mapping tools (vernier caliper, steel ruler, internal and external caliper, thread gauge, fillet gauge, etc.). ).

VI. Surveying and Mapping Procedures and Methods

(1) Understanding and Analysis Component

Before surveying and mapping, we must first conduct a comprehensive analysis and research on the components. By observing, studying and analyzing the structure and working conditions of each component, read the instructions carefully to understand the purpose, performance, working principle, structural characteristics and assembly relationship of each component.

1. Use

Gear pump is an oil conveying device for various mechanical lubrication and hydraulic systems. Used to supply pressurized oil to the lubrication system.

Step 2 perform

The invention has the advantages of simple structure, small volume, light weight, high volumetric efficiency, high pressure and wide application.

3. Working principle

The gear oil pump consists of a pair of gears with the same number of teeth installed in the pump body, and a sealed working volume is formed between the pump body, the end cover and the interdental grooves of the gears. When the gear rotates in the direction shown in the figure, the teeth of the right oil suction chamber gradually separate. The working volume between teeth gradually increases, thus forming a local vacuum. Therefore, the oil in the oil tank enters the oil suction cavity through the oil suction pipe under the action of atmospheric pressure. The oil sucked between the teeth is brought to the left oil pressure chamber with the rotation of the gear in the sealed working volume, and the teeth of the left gear gradually mesh. The sealed working space gradually decreases, the oil pressure increases, and the oil is squeezed out of the teeth and sent to the hydraulic system through the oil outlet.

(2) Disassemble the parts and draw the assembly drawing.

1. Disassemble parts

(1) Before disassembly, the disassembly sequence and method shall be clearly defined, and the required disassembly tools and measuring tools shall be prepared.

② In the process of disassembly, learn more about the gear pump, remember the assembly position, and label and code the parts with serial numbers when necessary. ③ Attention should be paid to:

Don't hit the precise or important parts with heavy objects.

Please do not disassemble the mating parts with high precision, so as to avoid the difficulty of reassembling and destroy their original accuracy.

Some important dimensions, such as relative position dimensions, extreme position dimensions of moving parts, assembly clearance, etc., should be measured first, so that the original assembly requirements can be maintained when reassembling parts.

Don't leave the removed parts lying around. It is best to assemble them into small units, or label the parts separately and keep them properly to avoid damage, rust or loss. Small parts, such as screws, pins and keys, which are easy to be lost, can still be installed in the corresponding holes and grooves after disassembly to avoid loss and misplacement. When disassembling parts, we should pay attention to the analysis of the assembly relationship and structural characteristics between parts, so as to have a deeper understanding of the performance of parts.

2. Draw the assembly diagram

The schematic diagram of (1) is generally drawn by orthogonal projection method, and most of them only draw one figure, and all parts are concentrated on one view as much as possible. If the expression is incomplete, you can add graphics, but the graphics must conform to the projection law.

(2) In order to make the graphic expression clearer, it is usually assumed that the drawing part is transparent body, that is, the outline and internal structure are drawn. ③ Some parts, such as shafts, bearings, gears and springs. , should use the symbols specified in the national standard. If there is no designated symbol, draw the general outline of the part with a single line to represent the basic characteristics of its shape.

(4) Add the serial number of parts on the assembly drawing, which should be arranged in disassembly order, and fill in the serial number, part name, quantity, material, etc. In the list.

⑤ Because the standard parts do not need to draw part drawings, the standard parts in the parts should be determined in time, and the specified marks should be written on the table.

⑥ A gap should be drawn between the contact surfaces or mating surfaces of two adjacent parts for distinguishing.

(3) Surveying and mapping parts and sketching parts

Part sketch is a part drawing (i.e. freehand visual drawing) based on physical objects. The size proportion of each part is estimated by visual inspection, and then the measured size figures are filled in the drawing.

① Understand the function of parts, analyze the structure of parts, and determine the view expression scheme.

(2) Draw a box and title bar on the sketch, draw the center line, axis and baseline of each view, and draw the outline of each view. Note that there should be places where dimensions and other contents are marked between views.

(3) Drawing full view, sectional view, etc. according to the determined view expression scheme. Erase the extra lines and draw the depth after proofreading. Note that drawing a view must be divided into two steps: drawing a draft and drawing a depth. Check carefully and don't miss the detailed structure. Such as chamfering, small round holes, rounded corners, etc. But casting defects should not be reflected in the view.

(4) Consider and draw all the dimension line and dimension line marked with parts size. When dimensioning, you can check whether the structural shape of the part is complete and clear again.

⑤ Measure the size of parts, fill in the size figures one by one, and write down the surface roughness code of parts. Fill in the title bar. Finally, complete the part sketch. ⑥ Standard parts should not be sketched, but the main dimensions should be measured, the types should be identified, and relevant standards should be consulted and listed for future reference.

Seven, now briefly introduce the view selection of main parts.

1, spindle

View selection: the axis is placed horizontally, and the observation direction of keyway is the main view. The part of the screw hole is cut, and the sectional view is taken from the part with keyway.

2. Driving gear

(1) Calculation module: ① Count the number of teeth; ② Measure the tooth top circle; ③ Calculate the modulus m by formula, compare the calculated m with the standard value in the standard modulus table, and get the similar standard value.

(2) View selection: The front view passes through the axis, the keyway is fully sectioned upward, and then a partial view reflecting only the shaft hole and keyway is drawn, and the keyway size should be checked by looking up the table.

3. Pump body

View selection: Due to the complex internal and external structure of the pump body, three basic views should be selected, namely, front view, bottom view and left view. The front view is partially cut away to show the structure of the oil inlet and the oil outlet. The top view is completely cut away, while the left view is partially cut away. The external structure of the oil outlet is preserved, and a partial view of the contact surface with the gland is drawn.

4. Pump cover

View selection: the front view shows that the shaft hole is placed horizontally, and the full-section view is taken, and the left or right view is taken to express the external contour.

5. Glands

View selection: the front view is horizontally placed with the hole as the axis for full section, and then the left view is taken to express the end shape.

6. Casing

There are four bushings. There are two driving shafts and two driven shafts.

View selection: Take the front view of half section or full section horizontally along the axis.

Requirements for surface roughness of parts

Supplement: dimensional measurement

When measuring parts, the corresponding measuring tools should be selected according to the accuracy of part size. Commonly used quantities include vernier caliper, external card, internal card, ruler, angle gauge, thread gauge and so on. Dimensions with low accuracy can be measured with internal and external cards and steel rulers, and dimensions with high accuracy should be measured with vernier calipers.

Summary of Engineering Drawing Training Chapter VI Today is the last day of training for certificate courses in mechanical drawing and CAD. Used in CAD and mechanical drawing. I never learned to understand, from vague to clear. Through this training, I believe I can apply the drawing of many things in my future life to what I have learned in this training, which really benefits me a lot.

On the first day of training, Mr. Chen Hailin told us about the training arrangements for these two weeks, and described the main learning tasks, objectives and significance of this week's training. Then he began to explain to us how to disassemble the gear oil pump, measure the size and draw a sketch. In the next few days, everyone in our group is working hard to finish drawing and measuring dimensions, so as to get a complete sketch of gear oil pump parts, and then use AUTOCAD20XX to draw sketches and assemble each part to get a complete assembly drawing, so that we can master the skills of drawing with CAD skillfully. In this training, my biggest gain is to learn how to draw a three-dimensional diagram, such as how to draw area, intersection, shell extraction, cutting, drawing nuts by stretching and inclining, coloring, and determining the coordinate XYZ plane. This CAD training is drawing with drawing tools and editing tools. I only hope that through this review and consolidation, I can draw various graphics more flexibly, quickly and accurately, thus playing a huge role in CAD and laying a solid foundation for the future. Because of this training, I clearly know that a team is strong, and what kind of teammates there are, what kind of achievements there are. So our group was praised by Mr. Chen, and I feel very honored as the team leader.

In a word, my professional knowledge has been improved in this CAD training, and at the same time, I have honed my patience, been able to concentrate on everything, and realized the happiness of cooperation and the importance of theoretical knowledge. In this CAD training, I feel happy, I have a sense of satisfaction and accomplishment.

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