During my internship, I participated in lathe work, welding work and locksmith, from which I learned a lot of valuable things, which made me learn things that I couldn't learn from books and enhanced my hands-on ability.
The first metalworking internship is very new to us. After one or two English classes in the morning, we set off for the practice base with great interest. When we arrived at the metalworking workshop, the teacher explained to us the significance of metalworking practice, curriculum arrangement and safety issues during the internship.
The first job I came into contact with was a lathe worker. The lathe operator uses the rotation of the workpiece and the movement of the cutter to process the surfaces of various revolving bodies. Next, the teacher asked us to make an automatic turning lathe with a diameter of 20 mm, so the tool can only move forward 10mm. We should master the operation sequence skillfully: first, align the tray with the workpiece at the zero position, and adjust the tool to move forward10 mm when the tool moves forward. Then, start the car and wait for 3/4 hours. After several trainings, we have become familiar with this operation. Although it looks simple, it is only after doing it that we know that the tiny gap has caused the quality of the whole part. 1mm usually feels small, so it doesn't matter, but I didn't know how much error there was in 1mm until I machined the parts on the lathe, not the error.
After the lathe worker became a welder, I saw the flashing electric sparks in the construction site countless times. I knew it was welding. I thought it was easy to operate, but it wasn't. This is much more difficult than I thought. The odor and dazzling light produced by welding are harmful to human body. We started the operation of my welding machine with a protective cover. We learned from the teacher that the angle of covered electrode is generally between 70 and 80. Of course, the speed of transporting covered electrode is even. However, in actual operation, we often slow down, and it is difficult to maintain a uniform speed, so the welding result is very uneven. Some places have short residence time, poor welding and cracks. It's not good where you stay for a long time. During the practice, I often stick covered electrode on the iron plate. Looking at the red covered electrode, I feel anxious. However, after repeated experience, I have mastered some tricks. This time, I realized: don't take one thing too simple. Only when you have done it yourself can you know the secret.
To the last item, it is also the hardest one-fitter. Looking at the vice installed on the workbench and various tools placed on the left and right: hand saws and various files, we know that we should use our own sweat and hands to make hammers. Next, we began to clamp a cylinder in the vice and started the work of filing hammer according to the teacher's route. At first, I didn't seem to make much progress in sawing iron. Later, under the guidance of my teacher, I soon felt the feeling of "sawing wood with a rope". Next, I have to file the surface of the iron block with a file. During the period, I watched the hammer become smooth and glittering. Although my hands and arms are very painful during this period, I can't say how happy I am to see my hammer change day by day. On the last day, the hammer was finally produced. Looking at it, thinking about the course of a week seems to have really grown up a lot. This is a DIY process. Although it is not up to standard, I really appreciate the importance of that kind of hands-on.
Article 2:
How time flies! In a blink of an eye, three weeks of internship time passed. During this time, I learned a lot that I couldn't learn in school, and I also realized many of my own shortcomings, which benefited me a lot.
Metalworking Practice is a basic course with strong practicality, and it is also an important required course for our engineering students to carry out engineering training, cultivate engineering consciousness, learn process knowledge and improve their comprehensive quality. However, as engineering students, we have never received serious formal engineering training before. Personally, it is probably because of long-term neglect that my engineering consciousness is relatively weak and I have not paid enough attention to the essence of this engineering thinking. At the same time, in actual operation, it is far from meeting the requirements of the work. In fact, as a freshman, it is unscientific to have direct contact with advanced professional knowledge before studying professional courses. Therefore, the school led us to carry out this internship, so that we can have a perceptual understanding of mechanical specialty from practice and lay a solid foundation for future professional courses. Practice is a very important part of college life, the source of continuous innovation and development of knowledge, the touchstone of testing truth and an effective way for college students to exercise and grow. It is even more important than the classroom. Only in practice can a person's knowledge and ability play a role and be enriched, perfected and developed. In order to grow up, college students should be diligent in practice, combine the theoretical knowledge they have learned with practice, keep learning in practice, keep improving and innovating, and integrate knowledge, ability and wisdom in practice to improve their comprehensive quality and ability and lay a good foundation for the success of their career.
This is the feeling of my internship.
Lesson 1: On the first day as a lathe worker, my heart was full of expectations. After all, this is my first internship.
The lathe worker has a lot to remember, but I won't worry because I have made sufficient psychological preparation and theoretical preparation before. But when it is really done, various problems will follow. First of all, I'm a rookie and I'm afraid of my hands and feet. I know a lot of procedures have been done, but I'm not sure. Maybe it's because I was still nervous when I first came into contact with the lathe. There are always problems in cooperating with classmates, no matter how patiently the teacher guides them.
One morning, a simple hammer handle was not finished, but fortunately there was no big problem in the end. In the afternoon, I will continue to do the unfinished work in the morning. After a morning of adaptation, the handle of the hammer was quickly made and it felt good. So my heart relaxed a little, and because of this, I made a mistake when I made the second hammer. I used the wrong angle of the knife when cutting the conical surface. Fortunately, under the guidance of the teacher, remedial measures were taken and the task was finally completed. Our group is always worried about the problem when turning the thread, which is done under the patient guidance of the teacher.
Lesson 2: Fitter
I feel very tired without the passion of the first day. But still full of expectations.
All we have to do is punch the hammer, set the screws and assemble with various files.
The whole process of this kind of work is manual labor. When the teacher explained, everyone thought it was quite simple, but the actual process was quite different. I remember a brother and sister described it like this: "The lathe worker even had oil on his face and the knife chips splashed;" The assembler's hands are blistered and sweaty. " Although it is a bit exaggerated, it does reflect the hard work of the fitter.
The process is hard, but the result is gratifying. Although it was a May Day holiday, I sweated for two days and finally made a hammer.
Lesson 3: Operation of milling, planing and grinding machine
I'm getting used to metalworking practice from now on.
There is a lot of content today, but the process is easier to do. Mainly watching the demonstration, the masters are very skilled and really envious. Help yourself. It feels good. The way of the exam is not bad, draw lots, hehe.
Lesson 4: casting
The most tiring lesson.
Modeling with sand suddenly found the feeling of childhood, but this is obviously not a child playing with sand, but a very careful thing, because mud is easy to deform, so be careful when doing it.
The last lesson: welding and die casting are a little reluctant and a little excited. Facing a brand-new technology, it was very simple to watch others do it before. At first, I found it really difficult, especially welding. I practice longer than others.
I still have a lot of experience during my internship. First, autonomous learning-after work, there is no longer a classroom, homework and exams like in school, but everything should be studied and done on your own initiative. As long as you want to learn, there are still many opportunities to learn. Old masters never hesitate to guide our work with their own experience, so that we can take fewer detours; Group companies and companies have all kinds of training to improve themselves. What we have to do is to determine what we need to know and what we are interested in. In our internship unit, I met several very kind old employees. As long as I ask them technical questions, they will answer them one by one, which makes me realize that there is a big gap between theory and practice, and also makes me understand some problems that I don't understand in class. The second is a positive and enterprising work attitude-at work, you not only create benefits for the company, but also improve yourself. A newcomer like me who has no work experience needs to do more and ask more questions to accumulate experience. In particular, our work does not have a clear scope of work like that of regular employees, but we just watch it freely. If we don't have a positive attitude, we may have nothing to do, so we need to take the initiative to strive for more work, accumulate more and improve more. Third, basic etiquette-you need to know basic etiquette when you step into society, which is often ignored by students. No matter how you dress or treat people, you should conform to etiquette so as not to affect your normal work. This requires more study in peacetime, such as paying attention to other people's practices or asking experts for advice. The fourth is dealing with people-as a student, what you face is nothing more than classmates, teachers and parents, and after work, you will face more complicated relationships. Whether you are in contact with leaders, colleagues and customers, you should handle it properly, communicate more, and put yourself in the other's shoes instead of just thinking about your own affairs.
I think, through this internship, I realized many of my shortcomings and deficiencies. The first is lack of work experience. Because of lack of experience, many problems can't tell the priorities, and some training or learning can't find the key points. As the internship goes on, I think I will gradually accumulate experience. The second is that the work attitude is still not positive enough. You can only complete the assigned work in the work, and you can't ask for assignment on your own initiative when there is no work task. If there is no work to do, I will relax and I can't study actively. This is mainly because laziness is at work. In the future, I will try my best to overcome inertia, ask for assignment when there is no work task, and study independently when there is no work assignment. Third, we still need to pursue perfection in our work. At work, we are not allowed to be sloppy at all, and we should always bear in mind seriousness. The fourth is poor hands-on ability. Seeing that the master is doing well, I always feel quite simple, but it is really difficult to operate by myself.
Solid professional knowledge is a solid foundation for improving work level. I may feel boring when I study professional knowledge at school, but after work, I will find how important professional knowledge is. But if I want to improve my work efficiency and quality, I just know that this knowledge is far from enough, and I have to master it. As a production technology, it is the authority of equipment in automobile enterprises. Without solid mechanical knowledge, how can we convince people in this field? How to solve equipment problems quickly and effectively?
Experience:
It is more appropriate to describe the short three-week metalworking practice with the phrase "painful and happy" This internship not only brought us experience, but also cultivated our hard-working spirit and rigorous and serious style. I can't feel it. It doesn't matter if the workpiece is a few millimeters short. Every mistake can bring huge losses.
"It is shallow to talk on paper, and you can learn things by practice."
In this way, three short weeks passed. I have been very tired, very bitter and have thought about it. This work is not satisfactory, but it is of great significance. No pains, no gains. The exercise we get is far higher than what we pay.
Article 3:
The five-week metalworking internship is over. Although we were very tired during the internship, we were very happy because we learned a lot of useful things and exercised our practical ability. Although the internship period is only five weeks, it is only a small part in our college life, but it is a very important part. It's hard for us to forget. After all, it is a real experience of society and life.
Through this metalworking practice, I learned the basic knowledge and operation methods of locksmith, lathe worker, milling worker, grinder, CNC lathe, milling machine, spark machine and wire cutting machine. Mainly learned the following knowledge: fitter, lathe worker, milling worker, grinder and other operations.
Item 1
In the practice of locksmith, we know that the main contents of locksmith are scraping, drilling, sawing, filing, assembly and marking; Understand the structure, classification, selection, filing posture, filing method and quality inspection of archives. Our training program is to make a small hammer, which is easier said than done. Our task is to manually press a 30+0 15 cm long round bar into a 20×20+0 12 cm long small hammer. A little carelessness in this process will lead to the scrapping of the whole work. First of all, we must get the right gear. It is the key to keep the file moving in a straight line when filing the plane. There are two kinds of filing force: horizontal thrust and vertical pressure. When pushing the file forward, the front hand pressure gradually decreases, and then it decreases when pushing the file to the middle position, and the pressure on both hands is the same. When pushing the file forward, the front hand pressure gradually decreases and then increases. No pressure is applied when the file is returned. This will make it easier for us to file. At the same time, I also know that the locksmith's safety technology is: 1, and the bench 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, etc. ), should be checked regularly, found damaged shall not be used, need to repair the rear can use. 3. When the vise clamps the tool, it is not allowed to use a hammer to beat the handle or steel pipe of the vise to exert clamping force.
Then scrape, grind, drill, hinge and so on. Although it is not very standard, it is the crystallization of our sweat and the result of our struggle for several days.
To tell the truth, locksmith internship is boring. He may have been doing it all afternoon, but he kept repeating an action. He still has to be strong and do well. That is, a file that goes back and forth on the workpiece with a file. My hands are sore and my legs are stiff when filing at night. However, when he is tired, he can see the teacher personally guiding and demonstrating. Like us, he often gives me this. A few days later, looking at my own processing results, I want to say thank you to the teacher who guided us.
Item 2: Easy turning and milling.
Turning and milling is not completed by numerical control, which requires high manual operation ability. First of all, the teacher asked us to be familiar with the various parts of the lathe while listening. Lathe is mainly composed of gearbox, spindle box, change gear box, feed box, slide box, tool rest, tailstock, lathe bed, lead screw, polished rod and joystick. Milling machine is mainly composed of spindle box, spindle, column, electric control box, workbench, coolant tank and lathe bed. Lathe and milling machine are operated by various handles. The teacher explained the function of each handle to us, and then let us get familiar with the machined parts casually. The teacher first demonstrated the operation method, processed a part, and then let us start processing. A very important aspect in lathe machining is the selection of suitable tools. First, we have to turn a bearing-like part. This is a real test for people like us who have never used lathes.
I kept turning the horizontal and vertical control handles and carefully processed them all afternoon. When I thought I was almost the same, I was ready to make the final cut, but I rashly reduced the diameter of the arc! I am heartbroken and painful! The most uncomfortable thing is that my calf hurts after standing for a day. But the joy of success when I handed over the car parts to the teacher made me forget that my calves hurt when I stood. This joy of success can only be felt through personal training.
As college students, after more than ten years of theoretical study, we have been told more than once that there is a gap between theoretical knowledge and practice, but we have never taken this sentence seriously and have no chance to verify the actual gap. Metalworking practice gives us the opportunity to master knowledge in practice. Without the rigorous environment in the classroom, we felt the atmosphere in the workshop. The studious eyes of the students and the careful and patient operation of the instructor constitute the common scenery in the workshop. After staying in class for a long time, we feel the importance of practical ability. You can't finish the actual work just by thinking and thinking with your head. Only when you have a scientific knowledge system and master the practical ability, including the continuous accumulation of mechanical operation and experience, can you apply what you have learned to practical work flexibly and effectively. Metalworking practice is an effective way to cultivate students' practical ability. This is another kind of learning classroom. Through our hands-on, we supplement and question the theoretical knowledge we have mastered. This is just the opposite of traditional classroom education. These two kinds complement each other and can fill the gap and make up for some blind spots of one of them. Through metalworking practice, I feel that the actual production mode is still relatively backward, and I can't actually operate the advanced equipment introduced in the book. The equipment in practice is often labor-intensive and low in technology, but some basic knowledge can be applied in practice.
The third item: grinding operation and visiting CNC lathes, milling machines, spark machines and wire cutting machines.
At the end of our training, the teacher took me to the grinder training room to explain and operate the grinder. After listening carefully, we began to operate the machine tool and grind the hammer made by the fitter in front. Under the teacher's careful instruction, we use the lathe to process our work again, making our first work more perfect. After finishing the grinding task, the teacher took us to the CNC training room in his spare time to explain the principle and operation of some CNC equipment, which laid a solid foundation for us to learn theoretical knowledge in the future.
To sum up, although what we have learned in the five-week training is only a scratch for technicians, everything has a process. What we have learned is the foundation, and technicians have "evolved" from simple to complex. The most gratifying thing is that no students were injured in these internship positions with different degrees of danger. On the contrary, some sweet smiles will appear from time to time during the internship, which is inseparable from the seriousness and intention of the students. Metalworking practice made me feel the pain and happiness of being a worker in the classroom for a long time, and also tested my knowledge. Metalworking practice made me deeply realize the meaning of life-nothing is difficult in the world, as long as you are willing to work hard and grind the iron pestle into a needle!
Article 4:
The one-month metalworking internship is over. In the past month, I feel that I have gained a lot from both the teacher and the content of my study. I really appreciate this experience.
For metalworking practice, I think it is necessary to experience it as an engineering student. An engineer's experience of not touching factories and machines is incomplete, so the metalworking practice course in our school provides us with such a platform that we can fully understand factories, tools and machines, and then understand and love them. Metalworking practice is of great help to my machine operation, my hands-on ability and my understanding of tool application skills.
The process of practice can really experience a kind of happiness. Of course, there are always troubles. It can be said that the whole process has been painful and happy. Every job now seems to be vivid, and the happiness and pain are more cherished.
For example, in my first job as a locksmith, I tried to file every piece of iron, but there were problems here and there. As a result, the first workpiece is much smaller than others, and naturally there is no higher score. When I was making the second workpiece, I kept asking my classmates and teachers around me how to file it flat enough, how to use the file and how to use the technique. They all gave very patient explanations. In three days, I gradually learned about the use of files, saws, etc. Finally, I have a certain understanding of the tools, and the works I made are finally similar.
The casting left a deep impression on me. Maybe I took things too seriously, and the teacher suggested that I should fill the sand more tightly in the mold, so I rammed the filled sand again and again, wasting a lot of time. When others have started to fill the sand in the second mold, my first mold has just been filled in half, and finally I am busy with the whole process. When we finally finished grading and cleaning, I found that the ones I filled were as hard as bricks. I found that this was not a good thing. Pay attention to quality on the one hand and speed on the other.
There are also computer aided design (CAD), wonderful shapes and wonderful shapes. I didn't expect to learn to understand so soon. Of course, I also want to thank the teacher for his detailed explanation and help!
At the same time, in the process of internship, I really learned some advanced machines, advanced processing technology, processing methods, efficient production time and high-quality processed products. Faced with these feelings,
The experience of metalworking practice (2) I feel that my interest in machinery has been greatly stimulated, and I can feel a heartfelt happiness in the face of these machines. I think my keen interest in machinery will stimulate my strong motivation to learn machinery in the future. However, I know that motivation alone is not enough. I also need persistent patience and perseverance.
Metalworking practice also gave me great exercise opportunities in another way. I am always the last person to leave the factory. I'm not saying how serious I am, but I know my practical ability is very poor. What I need is to exercise myself patiently step by step and really improve my practical ability. My hands-on ability is poor. What can be done in an hour usually takes me two or three hours. After two or three hours, I may not be better than others. I am also in a hurry, trying to speed up, but I can't. Once I have the speed, I lose the quality, remember that the quality has declined. After the metalworking practice, I still can't balance my time allocation, but I absolutely believe that I have learned a lot.
I know, I learned a lot. The first is patience, not just locksmiths. Every job needs patience, seriousness and persistence to be done well. Every job is a task. How to properly complete each task is to grasp the balance point, that is, to have a cool head and patience.
Secondly, it is careful, and all kinds of work need careful observation to understand the connotation. Only by careful observation can we have a certain grasp of this type of work, the processing of each component, the operation direction of each machine handle and the keys on each keyboard, and we can master the hidden usage. Only by being careful can we have a certain understanding of the working principles of various types of work.
Again, be careful. Safety should be emphasized before each type of work practice, which is also the safety at the beginning of the whole metalworking practice, so be careful. It is really touching and creepy to hear that the intern teacher will tell us so many tragic things that happened on the lathe. I will never operate a lathe with gloves on; Never again, forget to turn off the power of the machine when you leave; Never touch the equipment without permission again ... because I know that this kind of care is related to your life, and I need to ensure the longevity and health of my life. If an accident happens just because I am careless and don't listen to the teacher, the price is really too high.
The above is my metalworking practice experience, and I would like to make some personal suggestions on some aspects of this metalworking practice.
1. Regarding the extension of internship time, I always feel that it is difficult to learn so many kinds of jobs in such a short time, and I feel that many places are not thoroughly and clearly learned. So I suggest that we can extend the study time. I always think metalworking practice is very helpful to me, and I think it is the same for other students. Since it is so useful, why not extend its time? ! !
2. Very advanced equipment has never been seen. Can you add some video lectures to talk about some world-leading equipment in this major, as well as its processing technology and the quality of abrasive tools processed?
I really want to know the internal structure of the machine tool. I am very interested in the internal mechanical structure of each machine and lathe, so I especially want to know the installation of equipment and the transmission of power. So I especially hope to take out some machines and ask the teacher to explain the internal working principle of the machines, so that on the one hand, students can avoid improper operation and damage the machines, on the other hand, we can have a little understanding of the maintenance of mechanical lathes as students.
4. I always feel that the era of gear transmission is over, and some new transmission methods are needed to replace gears. The friction of gears and the vibration during transmission have brought great damage to the service life of machinery. On the other hand, the huge error of gear transmission is not conducive to the accurate manufacture of products, and the huge noise pollution has also had a great impact on the working conditions of employees, so I think the era of gears is coming to an end.
Finally, thank you again for your patient explanation and tireless help during the metalworking internship, which has greatly improved me. Thank you!