Summary of general milling practice

The hard internship life ended inadvertently, and you must have gained growth and achievements. You might as well sit down and write an internship summary. Is it impossible to write without a clue? The following is the general milling practice I summarized for you, hoping to help you.

Summary of general milling practice 1 practical purpose:

Milling practice is one of the necessary ways of students' cutting technology, which can cultivate students' observation ability and hands-on ability, broaden students' horizons, and organically combine students' theoretical knowledge and operation practice.

1. Understand the model identification of milling machine.

2. Understand the composition of ordinary milling machine and the function of each component.

3. Master the correct operation method of milling machine.

4. Master the technical points of safe operation of milling machine.

5. Understand the types of milling cutters.

6. Master the use of measuring tools.

Milling planes and steps:

1. Master the dial gauge calibration fixture and its installation method;

2. Master the use and storage of straightedge, dial indicator, vernier caliper and micrometer;

3. Master the machining method of plane and step surface and the selection of milling cutter;

Machining parts with dividing head and dividing method;

1. Understand the purpose and structure of the dividing head;

2. Master the indexing principle and method of the indexing head;

3. Master the use of the dividing head and its accessories;

4. Try to mill the workpiece evenly on the dividing head.

Internship content:

Milling planes and steps:

From the reading of the actual textbook and the explanation of the instructor, middle school students must find out the following questions:

First of all, understand the correct use of straightedge, dial indicator, vernier card and micrometer.

1. Types, characteristics, grinding characteristics, durability concept and installation of common milling cutters.

2. What two materials are commonly used to make the cutting part of milling cutter? What are their characteristics?

3. Correct installation of milling cutter and workpiece.

4. How to accurately calibrate the fixture (vise)?

5. Reasonable selection of tool feed, cutting speed and cutting speed.

6. Advantages and disadvantages of forward milling and reverse milling.

7. What happens if the workpiece stops or returns during feeding?

8. According to the requirements of the size and surface roughness of the workpiece in the drawing and the demonstration of the instructor, the students conduct the milling operation training for the plane and step workpieces.

9. Check the workpieces processed by yourself.

10. Clean up the sundries of the machine tool, and sort out the parts processed by the dividing head of the knife measuring tool and the dividing method.

Learning content:

1. Structure and transmission system of Universal dividing head.

2. What are the main accessories of the dividing head and their functions?

3. The principle and calculation method of simple and differential indexing.

4. Installation of indexing disc and clamping of workpiece on indexing head.

Actual operation:

1. Conduct two graduation exercises according to the requirements of the master.

2. According to the requirements of the drawings and the demonstration operation of the master, the hexagonal operation training is carried out.

3. Check the workpieces processed by yourself.

4. Clean up the machine tool sundries, and arrange the tools and measuring tools.

Summary:

1. Through several weeks of practice, I have a deep understanding of the characteristics and processing range of milling, the composition, working principle and use of milling machine; Have the ability to independently measure workpieces, process planes and grooves, and replace and install tools; Achieved the purpose of internship.

2. The operation of the milling machine is simple and easy to learn, but you should not relax during the operation to prevent accidents.

3. As one of the commonly used methods in metal cutting, milling has high milling efficiency and wide machining range because the main motion of multi-edge multi-cutter is also rotary motion; On the other hand, the dimensional tolerance grade of milling workpiece is generally IT9-IT7, which has low surface roughness value, is suitable for mass production and has low cost. Therefore, milling has become a universal promotion method in metal processing. I believe that with the rapid development of science and technology, milling will surely open up new glories for industrial production with its strong vitality.

Experience:

This is the last semester of the university, and the internship stage of this semester has already started in the affiliated technical school. Students in technical schools are full of vigor and vitality. Under the sunshine, they are particularly energetic and passionate, and sometimes they exude the breath of youth. After the explanation, guidance and demonstration of the internship teacher, the students worked hard. In this semester's milling practice, the teacher gave us a detailed introduction to the relevant knowledge of milling workers and the types, principles and usage of milling machines.

Milling machines are divided into vertical and horizontal. The workpiece to be processed is clamped on the flat-nose pliers of the workbench, and the horizontal, vertical and up-and-down movements are controlled by the feed turntable, while the cutter remains motionless, just the opposite of the lathe. After being familiar with the working principle and operation of the milling machine, the teacher gave us the task of cutting a cylinder into a square row, requiring the side length of the square to be 60 mm We clamped the workpiece on the flat-nose pliers, and then turned the turntable to control the position of the flat-nose pliers. When the cutter is basically in the center position, the cutter begins to align. After alignment, set the turntable to rotate for two and a half turns as required, and the workpiece can be raised by 6.5MM, so that the workpiece can be processed in a short time.

Milling has high machining efficiency and is a common tool for metal cutting. It is widely used in production. I hope I can have more opportunities to participate in this practice in the future and constantly enhance my hands-on ability. With the patient and meticulous teaching of the class teacher and our active cooperation, I thoroughly understood that practice is the real standard for testing truth. The readings of vernier calipers I have learned before are very vague, and the requirements for errors are also very high, which makes me feel passable. However, the workpiece errors required in this internship are all 0. 1mm, which makes me unprepared. Under the guidance of the teacher, through this internship, I basically mastered the reading of vernier caliper. What seems simple is not so simple to apply.

Through this internship, we learned about the production mode and technological process of modern machinery manufacturing industry. Familiar with the main molding methods and processing methods of engineering materials, the working principle and typical structure of the main equipment used, the use of fixtures and measuring tools and the safe operation technology. Understand the knowledge of mechanical manufacturing process and the application of new technology, new technology and new equipment in mechanical manufacturing.

Have preliminary independent operation skills in the main molding and processing methods of engineering materials. In the process of understanding, being familiar with and mastering certain engineering basic knowledge and operation skills, we have cultivated, improved and strengthened our engineering practice ability, innovation consciousness and innovation ability. We have cultivated and exercised our own views on labor, quality and economy, strengthened our awareness of observing labor discipline, safety technical regulations and caring for state property, and improved our overall comprehensive quality.

In the whole internship process, we are very strict with our discipline, and make students' internship rules. At the same time, the requirements for filling in the practice report, cleaning the machine tool site and observing the safety operation rules of various types of work have been strengthened, which has played a good role in promoting the cultivation of students' comprehensive engineering quality. The factory master's grading of the workpieces we do gives us a clear understanding of the scores of our products, which plays a certain role in improving our quality awareness. Only by helping each other can we complete the task, which makes us have a deeper understanding of the concept of team and let us understand the importance of team spirit!

Summary of general milling practice 2 i. Practical purpose

1, to understand the technological characteristics and processing range of milling.

2. Understand the composition, movement and usage of commonly used milling machines, and understand the general structure and usage of commonly used milling machine tools and accessories.

3. Be familiar with the milling processing method and measuring method, and know how to use the indexing head for simple indexing processing.

4. Fix the workpiece and cutter correctly on the milling machine to finish the milling of plane and groove.

Second, practice equipment

1. Milling machine is a machine tool for milling workpieces with milling cutters. Milling machine can not only mill planes, grooves, gear teeth, threads and spline shafts, but also process more complex contours, with higher efficiency than planer. They are widely used in machinery manufacturing and repair departments. Milling machine can process plane (horizontal plane and vertical plane) and groove (keyway, T-groove, dovetail groove, etc.). ), toothed parts (gears, spline shafts, sprockets, helicoids (threads, spirals). In addition, it can also be used to process the surface and inner hole of the rotary body and cut it off.

2. Milling cutter-There are many common types according to the purpose.

① cylindrical milling cutter:

② End milling cutter:

③ End milling cutter:

④ Three-sided milling cutter

⑤ Angle milling cutter:

6. Saw blade milling cutter; The structure of milling cutter is divided into four types.

① Integral type:

(2) Integral welded tooth type:

(3) with teeth:

④ Indexable type:

3, maintenance and maintenance of milling machine:

1, pre-shift maintenance:

Check the important parts.

Wipe the exposed rail surface and lubricate all parts as required.

Idle and check whether the lubrication system is normal. Check the oil level, the oil level should not be lower than the oil level, and fill all parts with lubricating oil.

2. Maintenance after work:

Do a good job in cleaning beds and components, and clean up iron filings and surrounding environment. Wipe the machine tool.

Cleaning agent, clamp, measuring tool.

The ministries returned to their positions.

Third, the processing of internship parts

Since last Monday, we have started the practical training course for milling workers. Due to the limitation of the school's equipment, we are divided into morning shift and night shift, working in a group of three, processing a "V" shape and completing the training course of equal parts!

Trial training steps:

1. On the first day of class, Mr. Wang showed us the structure of the milling machine, which made us understand the structure of the milling machine, the purpose of each part, the processing range and so on.

2. Each of us received an irregular cuboid cast iron, and we were measured. Found that there is machining allowance.

3. We find the most irregular surface to process, milling as little as possible, and milling it flat.

4. Start milling the opposite side based on this surface, and ensure the thickness is 29 mm ..

5. Re-process two longer surfaces to ensure that the width is 45.

6. Finally, start milling the length of the workpiece, and ensure that the hexahedron size is 29×45×55 after milling.

7. After that, under the guidance of the teacher, we milled two 9× 9× 45 inclined planes at two adjacent corners in the length direction of the hexahedron. When milling the inclined plane, we tilt the workpiece 45 degrees, use the universal angle ruler to ensure the angle, and then process it after calculation.

8. After milling the inclined plane, we have finished the milling of single step and double step. When milling steps, we use a cylindrical milling cutter for milling. And completed the one-step elimination.

9. Next, when milling the V-shaped groove in Jining, the workpiece is still inclined at 45 degrees, and the thickness is guaranteed by the bottom teeth and the width is guaranteed by the peripheral teeth. After milling, it is released.

10. It's time to grind the neck of the T-groove. We will process it on a horizontal milling machine.

1 1. After that, we finished the processing of the T-shaped groove. In the process of machining, we aim the milling cutter at the center and lower it to 1 1mm for milling.

12. The next step is drilling, which is very simple. After drilling, calibrate the hole with No.5 and No.6 drill bits, and then deepen the hole with the diameter of 10mm at the original hole. 13 Next, let's start milling keyways. After calculation, we put a small piece of paper next to the workpiece with oil, aim it at the cutter, then reset the display screen to zero, input the size and process it. 14 finally start milling the cross groove, or start milling according to the above method, and finish machining the cross groove!

Fourth, the inspection of parts.

In rough machining, use vernier caliper to detect parts, in finishing, in order to reduce errors, use graduation ruler to accurately detect parts, depth ruler to detect groove depth, and angle ruler to detect verticality!

Verb (abbreviation of verb) is the key and difficult point.

The first point of milling practice is safety. Secondly, pay attention to protect the cutter and milling machine from damage. In addition, you must be careful when milling parts, and don't blindly mill them. When necessary, it is necessary to calculate, ensure the important dimensions, control the feed rate and ensure the smoothness of the parts. Clamping must be correct.

Sixth, internship experience

After this milling practice, I deeply understand a truth: only people with heart can do things well. Everything should be down-to-earth and serious. This internship also strengthened my hands-on ability, taught me how to operate the milling machine, and gained a new understanding of machining. I think everything in the future should be as energetic as processing parts, never give up, be serious, careful and willing to suffer. Only in this way can we really get things done!

Summary of General Milling Practice In Chapter 3, the production practice of milling parts and products is preliminarily mastered through milling practice. Understand and master the general knowledge and skills of milling process, cultivate their own hands-on ability, and lay a practical foundation for future follow-up courses and junior course design, graduation design and mechanical technology work.

During the two-day internship, I learned the following knowledge:

1, understand the safety knowledge of the pulverizer and learn the essentials of safe operation.

2. Understand the categories, models, specifications and symbols, performance and general selection knowledge of commonly used materials.

3, understand the tool material.

4. Understand the use and measurement of calipers, micrometers, square rulers and height rulers.

5. Understand the production process and flow of milling parts, and master the design of simple parts.

6. Be familiar with milling parts and complete the technological process of square parts.

In the process of machining, although the problem of unequal gear spacing appeared, it was found and corrected in time under the guidance of the teacher, which made the machining go smoothly. Similarly, a cylindrical workpiece should be milled into a regular hexagon with a milling cutter. First, the tools should be aligned. This step is done by the teacher. Then, the workpiece should be moved upward by an appropriate distance. How much depends on the teacher's requirements, because the size is the distance between two opposite sides of a hexagon, so it is necessary to calculate the distance. Then, what needs to be calculated is how many turns the handwheel has to make from one side to the other. After calculation, there are 6 2/3 turns between adjacent sides.

What we learn in practice, which we can't get from books, will benefit us for life!

Summary of general milling practice 4 i. Purpose of milling practice:

1, to understand the technological characteristics and processing range of milling.

2. Understand the composition, movement and usage of commonly used milling machines, and understand the general structure and usage of commonly used milling machine tools and accessories.

3. Be familiar with the milling processing method and measuring method, and know how to use the indexing head for simple indexing processing.

4. Fix the workpiece and cutter correctly on the milling machine to finish the milling of plane and groove.

The above is the basic knowledge of milling workers, which I have always kept in mind during my internship and is also the consolidation of book knowledge.

Second, the internship overview:

Finally, it's internship time. I learned from my seniors that there was an internship a long time ago. At that time, I was eagerly looking forward to this day, because everyone was no longer satisfied with classroom teaching, although I learned from my classmates and friends that the internship was not as enjoyable as I expected.

Looking back suddenly, the week-long milling practice is over. Although I am very tired and bitter during my internship, I feel very happy! Because we not only learned the necessary knowledge as a milling worker, but also exercised our hands-on ability. But also let me deeply understand the great poet Li Bai's famous saying: As long as the kung fu is deep, the iron pestle is ground into a needle! On the first day of the internship, we watched the relevant knowledge about the milling practice and the CD-ROM of the matters needing attention in my milling practice. Seeing aircraft and flying iron flowers makes me both worried and excited. What I am worried about is that if the rumble of the aircraft makes people jumpy, bright red iron flowers will splash around and shine brightly, which will make people see things in a blur; Excited, waiting for nearly a year of milling practice is about to begin. This is our first time as a student to enter the factory as a respectable worker, and it is also our first time to go to an internship base where every engineering student has a try.

In fact, for our engineering students, this is an excellent opportunity to combine theory with practice and will comprehensively test our knowledge level. Milling practice is a compulsory technical basic course for students majoring in mechanical engineering. In the process of milling practice, students organically combine the basic process knowledge, basic process method and basic process practice of mechanical manufacturing, cultivate the comprehensive ability of engineering practice, and cultivate and exercise ideological morality and quality. Milling practice is an effective way to cultivate students' practical ability. It is also a compulsory course for our college students, engineering students and college students. It is very important, especially important, to have milling practice, which is also an opportunity for us to actually master knowledge. Without a rigorous classroom environment, we will feel the atmosphere of the workshop. At the same time, we feel more about the significance of being a worker, which makes us more aware of our responsibilities.

Through the teacher's explanation. I finally understand what a miller is. At the same time, I also understand why some people say, "Being a milling worker is the most tiring!" Milling is mainly manual operation, using various tools to complete the processing, assembly and repair of parts. Compared with machining, it has high labor intensity and low production efficiency, but it can complete the work that machining is inconvenient or difficult to complete, and the equipment is simple, so it is still an indispensable and important type of work in mechanical manufacturing and repair. The common equipment used by milling workers are milling table, table milling, grinding wheel, etc.

Third, the specific content.

In this internship, I mainly work as a miller. The so-called milling workers are skilled workers who use milling machines to process parts according to design drawings, which are divided into junior workers and senior workers. The machining accuracy of parts is high.

The operation requirements of milling workers are as follows:

1, the milling table should be placed in a place where the work is convenient and the light is suitable; Drilling rigs and grinding wheels should generally be placed on the edge of the site to ensure safety.

2, the use of machine tools, tools (such as drilling machine, grinding wheel, hand drill, etc. ), should be regularly checked, found damaged shall not be used, need to repair the rear can use.

3. When milling clamping tools, it is forbidden to use a hammer to beat the handle of the vice or the steel pipe to exert clamping force.

4, when using power tools, should have insulation protection and safety grounding measures. Wear protective glasses when using grinding wheel. When operating and processing on the milling machine workbench, there should be a protective net.

5. Blanks and machined parts should be placed in the specified position, neatly arranged and placed stably, so as to ensure safety, facilitate taking and placing, and avoid bumping the machined surface.

6. When drilling, reaming, reaming, counterboring, tapping and tapping, the workpiece must be firmly clamped, and the workpiece should be padded or the tool should be aimed at the workbench slot when processing the through hole.

7. When using the drilling machine, don't wear gloves or operate with cotton yarn. Please use special tools when replacing tools such as drill bits. Don't hit the drill chuck with a hammer.

Tell me about my internship experience.

1. In the first theoretical lesson, the teacher first emphasized the matters that should be paid attention to during the operation of the milling machine. Then the teacher introduced the concept, characteristics, processing range and related physical quantities of milling in detail, and led us to visit and explain the components of horizontal and vertical milling machines. After contacting and explaining the above contents, the teacher led us to the front of the milling machine and introduced in detail how to clamp the workpiece and related operations, and how to carry out plane milling.

It's time for practice. Let's mill the plane on the milling machine in groups of five. From the simplest start and stop, to the clamping of the workpiece, to the right knife, and finally to complete the processing of the workpiece, our group has achieved gratifying results.

3. Since we started milling the plane on the vertical milling machine, our group has exchanged machines with other groups, and we practiced on the horizontal milling machine. The horizontal milling machine has a fast milling speed, but unfortunately, the oil pumps of two horizontal milling machines in our school are broken, and the automatic movement of the workbench in the horizontal, vertical and vertical feed directions is also broken. Fortunately, we are well staffed. Finally, with the concerted efforts of our new Qi Xin, one qualified workpiece was successfully "born".

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