Self-confidence comes from strength, but at the same time also recognize their own shortcomings and shortcomings, to constantly adapt to the development of society, improve the pioneering and enterprising, to be able to ride the waves in the ever-changing development of the social torrent. Here is my turner practical training for you to bring the self-evaluation of five, I hope you like it!
Turning practical training self-evaluation1
A week of turner's internship soon came to an end, looking back on my knowledge and skills learned since a week, a lot of insight.
First of all, theoretical knowledge and safety education is essential, in the formal opening of the lathe turning parts before the teacher spent a whole day to us on the theoretical aspects of knowledge, although the first day felt very boring, but it is precisely one of the most important information. For example: when clamping the tool, the vertical distance between the blade and the bottom of the tool holder is 143.5mm, so as to reduce the number of times with the center of the parts to the knife, in the loading of the knife into the shims directly with a ruler measured 143.5mm basically level with the center of the parts, saving the time of the knife.
When clamping the workpiece must be tightened with a force bar, so as not to fly out of the parts of the accident and the correct use of tools and so on. Practice shaking the lathe, but also each internship lathe before each student must go through a test, only skilled shaking the big drag plate and the drag plate, in order to make the necessary preparations for turning parts, so as to avoid collision between the tool and the parts. Because the lathe we practiced this time is different from the lathe we practiced in the vocational school, there is a difference in the automatic feeding, and there is also a difference in the adjustment of the rotational speed. After understanding some theoretical knowledge of the lathe, the next day, we began to formally process parts.
Turning the first part, the feeling is still very nervous, every step is so careful, so as not to make mistakes. Large drag plate a small grid represents 1mm, the drag plate and small drag plate 0.02mm. turning end face, in about 2mm from the center of the time to stop the automatic feed to manual feed, so as to prevent the cutter head is damaged. When turning the outer circle, it is also necessary to stop the automatic feed and change it to manual when it is 2mm away from the size, so as to prevent the turning from overdoing it and the parts from being damaged.
The first and second parts turning is a step shaft, the main thing for us to master is the control of the outer circle and the use of micrometers and readings. In the measurement of parts, must use vernier calipers and micrometers with the use of the remaining 1mm from the specified size should be changed to micrometer measurements, so that it can effectively control the size of the outer circle. Then there is fine turning, you must first try cutting measurements to see if the size is within the range, so that the accuracy of the processed parts is relatively high.
The third part of the processing is the taper, you need to rotate the dial must be, when turning the first big drag plate shaken to the prescribed scale, and then use the drag plate against the knife, and then the small drag plate to exit, the big drag plate does not move, and finally adjust the scale and then use the small drag plate after the manual feed, the taper of the car. First of all need to try to cut a little, measured with a universal angle ruler, to ensure that the angle is correct under the scenario continue to turn the knife. If measured out and found that the small end of the gap, it means that the angle is adjusted large, and vice versa is small, need to re-adjust the degree and try again. Before machining the taper must not be able to take the part off the chuck, otherwise the turning out of the taper and the concentric axis of the circle deviation, resulting in the taper of the line into the shape of the curve.
The final day of processing is boring some of the basic operations, the first must be drilled, in the use of the drill, you must add coolant, the drill into the parts and drilling through the time to be slow, to prevent the drill wobble drilled out of the hole overly biased larger than the diameter of the drill. When boring, the main offset angle of the boring tool is 91 ° ~ 93 ° is most suitable. Turning time and the outer circle is roughly the same, but but the opposite direction. Measurement of size with the need to change to the inside diameter of the percentage meter measurement.
In general, the first week of internship is quite smooth, there is not much difficulty, after all, it is the previous internship, turning parts are also previously practiced, mainly in the length of the parts control is still lacking. I expect to continue to work hard next week!
Turning practical training self-evaluation2
Turning internship is over, but the feelings brought to me have remained in my heart forever.
The important thing is that the safety teacher told us about similar incidents that happened before, and I was really a bit scared, and many people had the same feeling as me. Teachers saw this and told us that as long as we follow the correct method and master the essentials, there will be no accidents, so I understood that the standardized operation, is an important guarantee of safety!
A car worker safety knowledge
1, work wear overalls, girls wear work caps, and long pull into the cap.
2, the work must be focused, not allowed to leave the machine without authorization.
3, the workpiece and the lathe need to be clamped firmly, so as not to hurt the workpiece and the lathe fly out.
4, the workpiece rotation, not allowed to measure the workpiece.
5, after the workpiece is installed, the three-jawed wrench must be removed, so as to avoid inattention to the lathe, so as not to fly out of the wrench hurt.
6, work is not allowed to crosstalk, adhere to their respective jobs two lathe practice knowledge teachers first initial demonstration of the operation method, and processed a part of it, and then let us start processing, at this time the teachers taught very seriously, and kept shuttling in the crowd, at any time to point out our mistakes in the operation, correct the hand, patiently analyze over and over again the advantages and disadvantages of the sand type we do.
Although the time is only a few days, but the masters are trying their best to teach us a little more in such a limited time, and expect us to really gain, rather than return empty-handed. Lathe processing in a very important aspect is to choose the right knife, at the beginning we have to give the end of the cylindrical car flat, we have to use the offset lathe tool to process, and then is to cut the groove, this time it is necessary to change the groove cutter. The width of the cutter head of the grooving knife is small, there is a main cutting knife and two sub-cutting knife, it is small, easy to break, so it should be used in a small amount of cutting. Cutting grooves when using the left and right knife method.
After cutting the groove, we have to process the thread, which is a real test for people like us who have never used a lathe before. I kept turning the horizontal and vertical control handle, careful processing, engaged in a whole afternoon, quite satisfactory, but compared to the teacher to show us the sample is still a lot worse, and in the processing of my hand was flying out of the hot iron chips burned, no matter how to say, in a word, or not skilled. But looking at the self-processed workpiece, the heart is really happy.
Car internship is a practical foundation course, is the mechanical students of various specialties to learn engineering materials and mechanical engineering foundation courses essential prerequisite courses, non-machine related professional teaching program is an important part of the practical teaching. Based on this, students must give this course to pay enough attention to fully utilize this month's time, to improve their hands-on skills.
Although the engineering training center of our school has defects such as limited number of equipments and relatively weak teachers, the school has effectively organized the short-term into the long term, so that students can practice in batches to achieve the dream effect. Time always passes in a hurry, and soon a few days are gone. After graduating from university, we have to enter the society and face employment, and the employment organization will not tell us the work to be done in a meticulous way like teachers do, but we need to observe, learn and evaluate ourselves. Without this skill, it will be difficult to meet the challenges of the future.
With the rapid development of science and the wide application of new technologies, there are many areas that we have not been exposed to, and it is only by daring to try that we can make breakthroughs and innovations.
Turning training self-evaluation3
I. Purpose of the internship:
1, to understand the lathe and related safety knowledge.
2, familiar with the basic operation of the lathe.
3, read the drawings and actually feel the operation of each step.
Second, the internship requirements:
According to the drawing requirements to make a file handle.
Third, internship information:
(a) Turning theory
1. What is turning
operation of the machine tool and machine tool processing of mechanical products of workers or trades.
2. Concept of turning.
After the rotary movement of the workpiece and the feed movement of the tool to change the size of the workpiece blank, shape requirements of a cold cutting method.
3. What is the main motion
The rotation of the workpiece is the main motion.
4. What is the auxiliary motion
The feed motion of the tool is the auxiliary motion.
5. Lathe model standard. CW6140-1000, 750
Which, C show the lathe category W show the characteristics of the code (universal) 6: Composition code 1: model code ordinary lathe 40: the main parameters allow the processing of the diameter of the 110400 millimeters (mm) 1000: the processing length
6.
Turning cylindrical, turning end face, turning borehole, turning cone, drilling, reaming, drilling center hole, turning special-shaped surface, grooving, cutting off, turning a variety of different threads, knurling, cold-wound springs and so on.
7. Important parts of the lathe. Spindle gearbox, walking tool box, drag plate box, tool holder, hanging wheel box, tailstock, drag plate, three rods, bed, accessories
8. lathe motion system main motion: motor → pulley → bed gearbox → spindle → chuck → workpiece to do the rotary motion
Auxiliary motion: motor → pulley → bed gearbox → light bar or wire rod → drag plate box → drag plate → tool holder → lathe tool to do longitudinal and transverse linear motion or turning Both directions of linear motion or turning a variety of threads p>
9. maintenance of the lathe: lubrication: go to work to add lubricating oil. Check: work idle 2-3 minutes. Anti-smashing: not allowed to knock on the lathe. Parking speed: change speed, must stop the machine. Mannerism: Clean the machine and the environment after work. Turn off the power: to ensure safety.
(B) safety regulations:
1. Work in overalls, girls should wear a hat and hair into the hat. Not allowed to operate with gloves
2. Work must be focused, not allowed to leave the machine tool without authorization or do work unrelated to turning. Hands and body can not be close to the rotating workpiece and lathe parts.
3. The workpiece and the lathe tool must be firmly installed, and it is not allowed to stop the rotating chuck by hand.
4. It is not allowed to measure the length of the workpiece when the lathe is in operation. It is also not allowed to touch the workpiece by hand.
5. After the workpiece is clamped, the chuck wrench should be removed to avoid flying out and hurting people.
6. Work is not allowed to crosstalk, leave their posts.
7. It is strictly prohibited to change the speed of the car.
8. When turning, the knife holder should be placed in the appropriate position to avoid collision with the turntable accident.
9. Use the special iron hook to remove the iron chips, do not allow direct removal.
10. Violation of safety regulations, teachers should be criticized and educated. Do not listen to education, repeated violations of the report to the faculty to give the necessary treatment, the internship grade recorded as zero.
(C) processing technology:
File handle processing technology
No. Processing steps processing information processing tools
1 turning cylindrical undercutting 160~170mm 115mm × Φ30 + 0.590 ° cylindrical turning tool, vernier calipers
2 turning steps scribing positioning 30, 70, 75, 80. 11530mm × Φ22(22.5)10mm × Φ17(17.5)90° external turning tool vernier calipers
3 car arc arc arc R = 35mm arc R = 105mm arc turning tool arc sample vernier calipers
4 shaping with a file to repair the emery cloth polishing file, emery cloth, vernier calipers
Fourth, turning experience :
The metalwork internship is a practical technical foundation course, is the science and engineering students to learn process knowledge, cultivate engineering awareness, improve the overall quality of the important practice of the required courses. After this short gold internship practical operation and practice, I gained a lot.
Turning is the use of workpiece rotation and tool movement on the lathe to process the surface of various rotating bodies. First of all, the teacher let our group members one person a lathe each to familiarize themselves with the lathe. Then give us on-site explanation, so that we understand the composition of the horizontal lathe structure and its use, the types of lathe tools, commonly used tool materials, tool materials, the basic performance of the tool material, the composition of the lathe tool and the main geometric angle, learned the installation of the lathe tool, three-jaw self-centering chuck installation of the workpiece method.
After that, the teacher gave us a demonstration of how to operate the lathe and a demonstration of billet turning section. The final is to let us start to practice the operation of their own independent, although the beginning of the operation of the technology is not very skilled, but after a few practice and group members to learn from each other, and ultimately we finally succeeded, looking at the workpiece of my hard work, we are very happy, quite a sense of achievement, but also appreciate the engineers and technicians, the workers are not easy.
After the turner internship, we are familiar with the basic knowledge of turning and turning process, and mastered the necessary basic operating skills. This internship makes me understand that "as long as we are willing to work hard, the courage to overcome all kinds of difficulties, not afraid of hard work, not afraid of tired, and seriously to practice, and perseverance, and ultimately we must be able to succeed".
Turner training self-evaluation4
The first day of work. After assembling in front of the factory door next to the 24th floor in the morning. The others scattered in all directions. We took the bull by the horns. Car labor went ah!!!! After entering the workshop, we have a big feeling: Tianda is worthy of being one of the engineering colleges. Anything that looks crappy on the outside can be used (and generally works well). The windows that look tattered on the outside are no less flexible than the new ones in the dorms. The fact that we've almost never seen these windows before adds to the wonder and novelty. Walking to the center of the workshop, I climbed on the "cabinet table" that held all kinds of turning tools and all kinds of beautiful workpieces to listen to the master's teaching. The first words of the master will always be remembered: turning is the most dangerous. The first up let you encounter. So you must pay attention to safety, girls must wear helmets (i.e., military training hats). This pass good scare! Make the flowers lose color, grass face twisted, a fine heart are anxious. Waiting for the grouping on all birds and beasts scattered. This scattered people and other 7 people are lucky to be divided into a group, follow Meng master. The master's body size is not tall, just where are round. Except for the _ head and the soles of the feet are flat, the lines of the whole body are almost all curved. In a great irreverent simile (Note: Teachers are generally described as more or less irreverent. But please believe that there are many things to respect and learn from these teachers. Below) like a date palm. And unlike most scared little people (us), the master was dressed in a short outfit: t-shirt, sandals. Also really put us at ease a lot: after all, from the master can see that he is not afraid. Master in, we are afraid of who! The master opened his mouth, Tianjin dialect, kind. It increased our
confidence index. After listening to the introduction of the lathe, assigned lathe, began to practice shaking the bed. 3 directions, 3 handwheels. Started the first close contact with the machine tool. I was fortunate to be assigned to the No. 6 bed (smooth start) very good, with me through the happy four days. Satisfaction 90, the soft spot is the lathe. The first five minutes, shaking, shaking; after five minutes, scurrying, scurrying. We then started comparing the newness of the beds, the feel of the handwheels. Take a closer look. Well, 8 beds actually have 4 kinds. Although much the same but comparison is indispensable. Fortunately, the master with enough time. Let us try one by one. About 30 minutes later, the real work began! The beauty of it all!
First of all, the master to show drilling, cutting material. Being the first one to eat, I went through one drilling and one cutting. Almost no effort. See usually considered unattainable steel is actually so easy to process, really still a little incomprehensible. After that, we distributed the materials and went back to our respective beds to do our "private work". First, I turned the hammer handle. We went through the process of turning a cone by roughing and then finishing it, and then spending half an hour turning it with our backs bent and not being able to move. Our backs and legs were tested. It wasn't easy!!!! After about 2 1/2 days. Our hammer handle was finished (our group also had two subpar pieces, my pocket-sized one and another student's creative one. But both are watchable. If you want to know the exact symptoms please dial 168477). It's all heart and soul! After that it was time for the real private work. We each had to make a part of a table vise. The teacher assigned the two hardest parts to the two people who clamored for the easiest parts (this assignment was approved by everyone) Action!!!! We had a short time to make each part, but the time limit was long. So for the rest of the day we talked about going everywhere to eat. From Tianjin to Fujian talking about all the food in the world. It was a spiritual relief for our legs that had been laboring for 4 days (I won't explain) and our intestines that had been in pain for a long time (we couldn't eat because of the horrible smell of the oil, so our intestines were in pain). Turner, bye bye!
Turning practical training self-evaluation5
A two-week internship in metalwork. During this period, we were exposed to the basic operating skills of machining, in the teachers patiently and carefully taught and in our enterprising cooperation, we did not have a case of major injuries, basically reached the expected requirements of the internship, the successful completion of the internship task.
Before the internship, I heard the students who have been interned said that it is very tired, but in the first day of the internship, I still with excitement and curiosity to the internship center, looking at a huge machine, I was at a loss, I think it is a little difficult to operate them. I don't know if I can operate them after the teacher taught me. In short, a few apprehensions, a few expectations. Our classmates were probably in a curious state of mind, touching the machines there and there. Next, the teacher told us the basic task and purpose of this internship, and emphasized the safety issue again and again. The final step is to give a lecture and demonstration.
We mainly study the turner, once into the operating room to see the lathe to understand the operation should not be easy, the results of the teacher also said that the turner is the most difficult. I told my self at that time, my hands-on skills were not strong, must listen carefully! Lathe is the use of workpiece rotation and tool linear and curvilinear motion to process the workpiece, as far as the basic information of its work, to be able to turn the outer circle. Inner circle, end face, cut off, grooving, inner and outer cone, various threads and knurling and forming surfaces. After the teacher's introduction, I understand that the installation of the turning tool must pay attention to the following points:
First, the turning tool clamped to the tool holder should be as short as possible to extend the length of the tool to enhance its rigidity.
Second, the number of shims under the lathe should be as small as possible and put neatly.
Third, the tip of the lathe tool should be equal to the center of the lathe spindle.
Workpiece mounting:
First, the extension should not be too long, which affects the clamping rigidity.
Second, the clamping must be firm and reliable, to prevent the workpiece from flying out of the injury, if necessary, use the force lever.
Third, when clamping the blank workpiece, pay attention to find the right good tight. At the same time there are three elements of cutting, cutting dosage selection, manual turning cylindrical, end face, step table method. Finally, the teacher also said the same internship tasks, and introduced the processing of this part of the process steps, I listened carefully, for fear of missing a little. I listened carefully and didn't want to miss anything. Eventually, the machine was demonstrated, and I watched it very carefully. Teacher's task is completed, then it is our turn to self-operation, we are a group of three, to each process a simple part.
At the beginning of our familiarity with the machine tool is not enough, resulting in our processing is not only very slow, and often wrong, should be machined parts on the parts of the precision requirements are very high, one is not careful on the scrap, you have to re-do, machining time is long and slowly on the machine tool is also familiar with the speed of the processing up significantly faster, and the accuracy is also significantly improved a lot. Finally, the next day at noon on the processing of three qualified parts.
The next three days, the teacher gave us the task of processing a more difficult parts, and precision requirements are higher, because of the previous basis, we processed a lot faster, but should be for the accuracy to and precision requirements are higher, because of the previous basis, we processed the speed of the higher, so it is still often out of the scrap. After efforts, in our careful processing or completed the task, successfully made parts.
Should be machining are standing, so two weeks down we are very tired, but had a very fulfilling, in this two weeks we still learned a lot of things.
1. Understand the knowledge of mechanical manufacturing process and new processes, new technologies, new equipment in the application of mechanical manufacturing, cultivate, improve and strengthen our engineering practice skills, creative awareness and innovation skills.
2. Mechanical internship training and exercise us, improve our overall comprehensive quality, so that we not only have a deeper understanding of the importance of mechanical internship, and improve our practical skills. Make us a better combination of theory and practice, consolidate our learned knowledge.
3. We also learned that teachers' dedication, rigorous spirit. Some teachers will again and again to the students to demonstrate how to operate, until the students really clear. Internship process we also carry forward the spirit of solidarity and mutual help male students to help female students, hands-on skills of students to help hands-on skills of weak students, we help each other to learn from each other, both learned how to cooperate and enhance the friendship between students.
4. In the process of internship we achieved the fruits of labor. These small parts that used to be difficult to believe, but is actually self-processed, this sense of pride, sense of achievement is difficult to express in words.
Machining internship allows me to feel the pain and joy of being a worker in the classroom, and at the same time to test the knowledge I have learned. The internship has made me y realize the meaning of life.
Labor not only transforms the natural world, but also transforms a person's mind. After this week's internship, I also have a deep understanding of this aspect.
1, labor is the most glorious, only to practice in order to appreciate the pain and pleasure of labor.
2, perseverance, careful and patient.
3. Be responsible and safe.
4. As long as you pay, you will get something.
Practice is the test of truth, after a week of metalwork internship, I learned a lot of work knowledge, but also to get the will to exercise, there are sorrows and joys, which is another valuable asset of my university life, my future learning and work will have a great impact.
Soon we have to enter the community, facing employment, the employment unit will not be like the teacher as a little by little detailed work to do to tell us, more is needed to our self to observe, learn. Without this skill, it is difficult to meet the challenges of the future. With the rapid development of science and the wide application of new technologies, there will be many areas that we have not been exposed to, only dare to try to make a breakthrough and innovation.
Just like our contact with the turner, although it is very dangerous, but requires each student to operate and to make a finished product, so that we exercise the courage to try. A week of gold internship to bring us, not all we have contact with those operating skills, not only after a few types of work required us to exercise a few skills, and more need to each of us at the end of the internship according to the self-scenario to sense, to reflect, diligent self-criticism, have gained, so that the internship to reach the real purpose of him.
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