1. Training Summary Report of CNC Milling Machine
Class: xx Name: xx
Student number: xx
Internship time: 654381October 8th to 654381October 8th.
Internship content:
After the National Day, we must clear our minds and welcome the second two-week metalworking practice. With the experience of the first internship, we seem very calm and calm this time. 65438 10/8, the first week of practice was CNC machining. We are very much looking forward to this type of work, because I heard from the master during my first internship that this is a relatively easy type of work in this major. This time, I met two familiar faces. They are the young instructors who practiced last time. It is said that our seniors and younger brothers stayed at their alma mater to work after graduation. It's always pleasant to see familiar faces. This week's internship is divided into three steps: one is CNC lathe machining, the other is CNC milling machine machining, and the third is CNC EDM machining. The first is the CNC lathe, which is programmed to control the lathe for processing. There are thirty-six people in our class one, and they are divided into eight groups by the tutor. The number of people in each group is more or less, while there are four people in my group. The tutor first taught us to be familiar with lathe operation and talked for a long time. To tell the truth, I don't really understand it, let alone operate it. Then the tutor taught us to write programming, and talked about G0, G 1, G2 and other functions. Maybe I have poor learning ability, but I still don't understand it. So I will humbly ask my tutor or classmates for advice. Practice makes perfect. After hundreds of exercises, I have basically mastered very basic operation and programming skills. Then the tutor assigns homework, and we have less than one day to do it (the first five days of internship, two days for CNC lathes and CNC milling machines, one day for EDM CNC machining, and the commuting time is 8:00- 1 1:00 in the morning and 2:30-5:00 in the afternoon). Homework is the work assigned by two tutors. I thought there was not enough time, but it was just an afternoon tea. For the first time, I realized the convenience and necessity of NC machining. At the same time, it is also the result of joint efforts between groups.
Then, we came to the EDM NC machining workshop. I didn't know anything about EDM before my internship. After the teacher's explanation, I realized that what we want to learn is one of the most advanced jobs in the workshop-EDM CNC wire cutting. This is strange to us, because of its magical and accurate operation, we have a great interest. Because this is a special treatment method, the equipment is expensive and the operation method is complicated. If the operation is improper, the electrode wire for cutting will break, and even personal and equipment accidents will occur. So, before we started today, the teacher gave us a detailed introduction of the four major components of the machine tool and their main functions: the numerical control device, the machine tool part, the wire feeding mechanism, the wire feeding frame, and the drag plate that coordinates the forming movement and the drag plate (X and Y directions) under the control of the computer. High-frequency pulse power supply has two functions (providing short-time pulse discharge) and working fluid system (insulation function; Chip removal and cooling). Numerical control WEDM technology is to process various small workpieces by WEDM using programmed programs. All we have to do is put the workpiece, align the knife and leave the other things to the computer. High accuracy, but slow speed. Because we only have one morning, the teacher directly showed us how to draw the graphics to be processed on the computer and input them into the cutting machine to do it. There are so many operation buttons on CNC equipment that I really don't know where to start at the moment. The teacher explained to us repeatedly and gradually became familiar with some basic operations. Since it is enough for a group to hand in an assignment, our assignment is to make a good schedule, calculate each step and give it to the teacher.
Finally, CNC machining of milling machine. Thanks to the first CNC lathe processing, this time it is much better, and the steps are exactly the same as the first operation. This time our task is to carve a pattern on a part. The size and appearance of the pattern depend on your programming. The first week's internship ended unexpectedly and smoothly. Through the operation and programming of CNC lathe, I deeply felt the convenience, accuracy and speed of CNC. As long as the correct program is input, the lathe will perform the corresponding operation. Compared with the operation of our lathe two days ago, it is much more convenient. It can make the machine complete several steps continuously and automatically, and at the same time, it can also carry out simulation of machining before processing. If it is not successful, the program can be repaired to reduce the waste of raw materials caused by misoperation. And as long as I finish the program, I can use it for repeated processing, which greatly improves the processing efficiency. Through the teacher's clear and dedicated explanation, we understand the basic principle of NC machine tool processing. As long as the machine tool is connected to the computer through a certain interface, the machine tool can be successfully controlled through certain application software, and the rotational speed, feed speed and feed speed of the machine tool can be controlled by programming, which greatly improves the degree and efficiency of machining automation. CNC machine tools can also automatically complete some complex machining processes. Through the internship of this type of work, I am more eager to become a mechanical engineer, and at the same time I should work hard towards this goal.
After a two-day weekend holiday, I ushered in the second and last week of internship. This week's internship is locksmith! The tutor is very strict this time. On the first day, he was severely scolded for being late. What he emphasized to us was the concept of commuting, not being late or leaving early. Then show us some discs about assemblers. Through disc demonstration and teacher's explanation. I finally understand what a locksmith is. At the same time, I understand why some people say, "Being a fitter is the most tiring!" The fitter mainly relies on manual operation and uses 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 locksmiths includes locksmith workbench, bench vice, grinding wheel, etc. The fitter's work scope includes marking, chiseling, sawing, filing, scraping, grinding, drilling, tapping and assembly.
Each student has a workbench and a drawer for collecting tools. The tutor first taught us these tools, such as 300mm file, hand saw, hammer, vernier caliper and so on. The teacher emphasized that tools are as important to assemblers as eyes are to myopia. Then explain this task. Our task is very heavy this time. First of all, we have to measure the distance of 22-24 mm, and then saw this size from an iron cylinder with a diameter of more than 30 mm, which must be emphasized! I feel full of pressure in an instant. I can't help it, although I don't want to, but I also know what to do at this time, put away my emotions and pick up the hand saw to work. The first time I saw iron with a hand saw, I broke a saw blade in ten minutes, and then another one in less than an hour. Ask the master if you have any questions. When the master taught me to saw iron, I should use even force and pull up the saw at a speed of 40 times per minute. After that, I gradually mastered the rhythm and finally sawed the small cylinder around 3 pm. Then file the iron. Most of us have a problem in filing the two sides of the cylinder flat and smooth, that is, the phenomenon of high in the middle and low around, so the master taught us the cross filing method, just hold your horses, file slowly, file out the intersection point, and then file flat and bright. Then measure the parallelism of the plane, and it will be the next afternoon after finishing this process. Then saw the cylinder into a regular hexagon with a side length of 30-3 1 mm, and of course gained a lot of weight. After all, the day before yesterday, with some experience, I sawed out the hexagon, and then filed it, flying on my fingertips, and iron filings filled the vise. This process is followed by drilling, chamfering and reaming (digression must be mentioned, there is an old master who is very strict, because we have always regarded documents as grinding, and he nagged that we only have the level of primary school students, but there is no model for college students, which is really a low-level mistake). Drilling machines are divided into table type, vertical type, swing type and hydraulic type with maximum power. Anyway, no matter how powerful it is, we mainly use bench drill, rocking chamfer, vertical reaming and hydraulic drill to see. The last step is threading and tapping. The tapping tool is divided into two parts: the first cone is pressed down three times, and it is necessary to pay attention to whether the first cone is inclined during the rotation. You don't have to press it after three turns, but you can move it after half a turn back. Finally, change the second cone and adjust it directly to low. The same is true for threading. Hand in your homework before 10 on the morning of the fourth day.
The last day and a half is used for exams, mainly to examine what I have learned before. The host gave us another working drawing. With the practice a few days ago, this workpiece is not difficult for us. Whether it is sawing, filing or drilling, we can do it and pursue better and more perfect workpieces. In fact, unconsciously, my mind has already changed, and it is no longer all kinds of reluctance and troubles on the first day. Now, we pursue to saw better, file better and do better! Looking at the small parts I made, looking at the results I got with my efforts and sweat, my heart is full of satisfaction! For this satisfaction, for this positive attitude, no matter how hard and tired, we must persist and work hard.
The last week's internship ended successfully, and my heart was full of faint disappointment, really disappointed! Don't give up those tough but lovely old masters, and don't give up those warm-blooded young people who can sweat like rain in a space with their classmates.
2. NC milling machine training summary report
After five weeks of milling machine training, although we are very tired, we are still struggling in the workshop under very tired and hard conditions. I have mastered very important theoretical knowledge from teacher Yu. In their own practice, when they encounter doubts, everyone takes the initiative to ask the teacher. Although, sometimes everyone is not careful and all the knives are shot. But I don't think this is a good thing. With such a profound knife collision lesson. I'm sure it will be unforgettable. At least I can pay attention to those details during the real exam. Learn from the past and do the parts well.
During these five weeks, everyone not only mastered the technology, but also learned how to work as a team. Sometimes you don't ask Mr. Yu directly when you encounter problems, but several people discuss how to do this step first. If something goes wrong, everyone will check it in time and then analyze the reasons. Although there will still be a knife collision, I think it may be due to carelessness. When checking the program, everyone checks that there are no errors in those important programs, and occasionally small mistakes lead to knife collision. I hope that students can gradually develop good qualities of carefulness in the future. During these days' training, everyone made parts together, pointed out and helped each other. Deepen the feelings between classmates. Under the patient guidance of teacher Yu, we gradually changed from ignorance to a little mastery. Thank you for your careful teaching and patient guidance. Following him, we learned the real skill. The following are the lessons I have summarized for our group's problems:
First: Be sure to return to zero after turning off and turning on.
Second: After establishing the polar coordinate system (G 16), we should pay attention to canceling it with G 15. When executing a program that needs to add tool compensation, tool compensation must be cancelled after use. When changing knives, you should also pay attention to changing knives and repairing them. Ensure that the size error of the parts is not too large.
Third: simplify the procedure if it can be simplified, and pay attention to some procedures that cannot be simplified. Don't abbreviate. You won't.
Fourth: Sometimes, manual and automatic methods are used to process the remaining workpiece allowance. When the allowance is small, manual method is faster.
Fifth, when milling the outer contour, pay attention to whether it is forward milling or reverse milling, and pay attention to the modification of tool compensation when milling. In addition, sometimes r or c should be comma.
3. CNC milling machine training summary report
Machining practice of CNC milling machine is one of the important teaching links in the teaching system of CNC technology application specialty. It is an intensive training of routine operation skills of CNC milling machine based on the application course of CNC milling machine, and it is an essential teaching link to have the basic operation skills of CNC milling machine and then form the application ability of CNC machining technology. The task of this training is mainly to strengthen the basic operation skills of CNC milling machines commonly used by CNC students; At the same time, make students have the basic operation and application ability of ordinary CNC milling machine, prepare for the operation and processing of CNC milling machine, and lay a solid foundation for the operation and processing of CNC milling machine.
By distributing the task book before training, students can clearly understand the training objectives, training requirements and matters needing attention, training steps and assessment methods, and overcome their fear of difficulties. Based on the learning transfer and promotion theory of learning psychologists, this course takes into account the inferiority and fear that may exist in the study of higher vocational students, draws lessons from the' tutorial' and' mentoring' teaching forms in enterprises, and takes face-to-face' one-on-one' teaching as the basic idea to realize the unit teaching mode of computer operation-finding and solving problems-computer operation-positive transfer thinking in practical teaching. Based on teaching materials, pay attention to programming in actual processing; Taking FANUC and Huazhong CNC programming instruction system as examples, the differences in format of other CNC instructions are explained, which broadens students' horizons and enables students to quickly adapt to different CNC systems after entering the enterprise.
In teaching, by processing a large number of parts and summing up experiences and lessons, students can draw inferences from others and learn from each other. In view of students' problems, teachers face-to-face guide and solve them, which enhances students' self-confidence, problem-solving ability and sense of accomplishment, and stimulates students' enthusiasm for learning; While paying attention to manual programming training, we also pay attention to the application of CAD/CAM in NC machining, which conforms to the latest technical application of enterprises and embodies the development trend of modern manufacturing technology.
In practical training, students are encouraged to design the structure, shape and size of parts by themselves according to their hobbies, interests and the processing range of milling machines, cutters and materials, and to independently program, select processing tools and determine the processing technology, and independently process the parts conceived by the office, which embodies independent learning and personalized development, and consolidates students' knowledge in drawing, technology, clamping and cutting tools.
In order to carry out research-based learning, students' fluky psychology of "muddling along" caused by the difference between the course and the general theoretical teaching organization mode was abolished, so that students were effectively controlled; Teaching adopts grouping teaching, and teachers scientifically and reasonably group students according to their learning situation; According to the number of milling machines in the school, for example, each milling machine has a total of ***8 sets, and each member is matched according to ability, and men and women are matched; Designate a group leader, clarify the responsibilities of the group leader and the direct cooperative relationship between the group members, so that students can form an atmosphere of mutual learning and enhance team awareness and competition awareness.
For students majoring in numerical control, the "digging" teaching method is mainly adopted. According to students' respective ability levels, the "step-by-step" method is adopted to strengthen the difficulty step by step, fully tap students' learning potential, improve students' academic performance at all levels, and at the same time, the personal difficulty requirements are different, which reduces the psychological burden of students' learning and improves the NC programming and processing ability to a limited extent.
While completing the teaching task, there are also some problems in the operation and training of CNC milling machines, such as insufficient number of milling machines and relatively little computer time for each student, which affects the training effect; The difficulty of teaching methods and training design topics needs to be further improved.
4. NC milling machine training summary report
Time flies, in a blink of an eye, we have been "metalworking internship" for three or four weeks. During the internship, we learned some things that are difficult to learn in class. While enriching my knowledge, more importantly, I got the opportunity to do it myself in the learning process. I have exercised my hands-on ability. During this period, we have paid a lot of sweat and gained valuable experience. This feeling is strongest during the internship of CNC lathe. CNC lathe is programmed to control the lathe for machining. Through the operation and programming of CNC lathe, I deeply felt the convenience, accuracy and quickness of CNC. As long as the correct program is input, the lathe will perform the corresponding operation. Automatically and continuously complete multiple steps, and at the same time, process simulation can be carried out before processing. If it is not successful, the program can be repaired to reduce the waste of raw materials caused by misoperation. And as long as I finish the program, I can use it for repeated processing, which greatly improves the processing efficiency.
Through the teacher's clear and focused explanation, we quickly mastered the application of NC machine tool programming software, mastered common functions, learned basic grammar and common programming sentences, and were able to carry out simple programming operations. Then we began to program my work according to the drawings. I'm not familiar with it at first, and there are always handling mistakes. After repeated research and revision, according to the teacher's requirements, I successfully completed the task and compiled the processing program in three ways. When the first program was finally successfully completed, I watched the interface successfully simulation of machining process and processed the finished product. I made goblets and gourds, and suddenly I felt a sense of accomplishment. Although what we do is only the most basic processing, which is quite different from the real production and processing, we still feel that we have gained a lot. Although the equipment we use is specially designed for practice, different from the real production and processing equipment, and relatively old, we still know the basic principle of NC machine tool processing. As long as the machine tool is connected to the computer through a certain interface, the machine tool can be successfully controlled through certain application software, and the rotation speed, feed speed and feed speed of the machine tool can be controlled. CNC machine tools can also automatically complete some complex machining processes.
After two weeks' practice, with the rapid development of modern science and technology and more and more dependence on human intelligence and knowledge, the scientific and cultural quality of workers has a decisive impact on the development of production and social progress. We studied electricity, which greatly promoted our future work. In addition, I also gained unexpected knowledge that I couldn't get in class. Maybe I won't take up these internship positions in the future, but the knowledge and feelings I have learned now will never be forgotten. It's dirty and tired, but it doesn't matter. The important thing is that we have achieved and achieved results. I think internships should allocate more class hours so that students can learn more work. In addition, the teaching time allocated to metalworking practice should be appropriately reduced, and more emphasis should be placed on letting us master knowledge through our own hands-on operation.
Finally, I also hope that the school can purchase more advanced industrial equipment, so that students can know more about the cutting-edge equipment of scientific and technological development, broaden their horizons and gain more knowledge. Especially those of us who study electrical automation, our theory is completely applied to practice, so we need to do research in factories with corresponding occupations. If we don't know anything about machinery, then we will really be employed in the future, and we will be in trouble when we need machinery. In short, we are very grateful to the school for giving us such an opportunity to practice in a factory environment before employment, which has played an important role in our future development.
5. NC milling machine training summary report
Numerical control lathe is the abbreviation of numerical program control lathe, which combines the characteristics of universal lathe, precision lathe with high machining accuracy and special lathe with high machining efficiency. It is the most widely used and covered CNC machine tool in China, and it is also an electromechanical integrated processing equipment that controls the machine tool to automatically process according to the given motion trajectory through digital information. After half a century of development, CNC machine tools have become one of the important symbols of modern manufacturing industry. In China's manufacturing industry, yes, the knowledge learned in textbooks is the most basic knowledge. No matter how the actual situation changes, mastering the most basic knowledge can keep changing. Now many students feel that the knowledge learned in class is useless and depressed, but I think how to deal with the ever-changing society without book knowledge? After this internship, although the time is very short, I learned something that I didn't understand in school for a semester.
For example, how to get along with colleagues, I believe that interpersonal relationship is a big problem for many college students who have just stepped out of society, so I deliberately observed how seniors get along with colleagues and superiors during my internship, and I also tried my best to ask for advice humbly. Improving interpersonal relationships is not limited to our own department, but also good relations with colleagues in other departments, such as the marketing department, so that the work efficiency will be high, and what people call "making money harmoniously" is not unreasonable in our daily work. Moreover, chatting with seniors at work can not only relax your nerves, but also learn a lot of things outside of work. Although we may not encounter many situations, it is also one of the purposes of this internship to get to know them.
Through this summer internship, I learned a lot and understood a lot. In the process of work, I learned to be patient and treat unfair treatment correctly, which I think will be very helpful for me to face unfairness in the future. In a word, this unforgettable summer internship experience has benefited me a lot and played a very positive role in my future development.
Soon we will step into the society and face employment. The employment unit will not tell us the work to be done in detail like the teacher, but we need to observe and learn by ourselves. Without this ability, it is difficult to be competent for future challenges. With the rapid development of science and the wide application of new technologies, there will be many fields that we have never touched. Only by daring to try can we make a breakthrough and make innovations. Just like the processing of parts that I came into contact with in my internship, although it is very dangerous, I have to operate it myself and make a finished product, which has exercised my courage to try.