Self-evaluation of lathe operator training 1
The practice of lathe work is over, but the feeling it brings to me will remain in my heart forever.
The important thing is that the safety teacher told us about similar incidents that happened before. I'm really a little scared, and many people feel the same way. The teacher 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 understand that standardized operation is an important guarantee for safety!
A, lathe worker safety knowledge
1, wear work clothes to work, girls wear work hats, and put their long arms in the hats.
2, must concentrate at work, are not allowed to leave the machine without authorization.
3, the workpiece and turning tool should be clamped firmly, so as to avoid the workpiece and turning tool flying out and hurting people.
4, the workpiece rotation, are not allowed to measure the workpiece.
5. After the workpiece is installed, the three-jaw wrench must be removed conveniently, so as to avoid accidentally starting the lathe, so as to avoid the wrench flying out and hurting people.
6. Are not allowed to go to work, to stick to the lathe practical knowledge in their respective jobs. The teacher first demonstrated the operation method, processed a part, and then let us start processing. At this time, the teachers taught us seriously, constantly shuttling through the crowd, correcting our mistakes in operation at any time, correcting our hands, and patiently analyzing the advantages and disadvantages of the sand mold we made over and over again.
Although the time is only a few days, the masters have tried their best to teach us more in such a limited time, hoping that we can really gain something instead of returning empty-handed. A very important aspect in lathe machining is the selection of suitable tools. First, the end face of a given cylinder should be turned flat, then it should be processed with a deviator, and then it should be grooved. At this time, we will switch to slotting knives. The width of the cutting head of the grooving knife is small, with a main knife and two auxiliary knives. The cutting head is small and easy to break, so a small cutting amount should be adopted. When grooving, use the left and right knife borrowing method.
It is really a test for people like us who have never used a lathe to process threads after cutting grooves. I kept turning the horizontal and vertical control handles and carefully machined the wings. I was satisfied for a whole afternoon, but it was still much worse than the sample that the teacher showed us, and my hand was burnt by the hot iron filings flying out during the processing. Anyway, in a word, I am still not skilled. But it's really fun to look at the workpiece I've processed.
Lathe practice is a very practical basic course, a necessary prerequisite for mechanical engineering students to learn engineering materials, mechanical manufacturing foundation and other courses, and an important practical teaching link in the teaching plan of non-mechanical related majors. Based on this, students must pay enough attention to this course and make full use of this month's time to improve their practical ability.
Although the engineering training center of our school has some defects, such as limited equipment and relatively weak teachers, through effective organization, the school has been transformed from short to long, and students' batch practice has been realized, achieving the coveted effect. Time always flies, and a few days pass quickly. After graduating from college, 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 more need us to observe, learn and summarize 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. A few days' practice as a lathe worker brings us not only the operational skills we have been exposed to, but also the skills that we are required to exercise after several types of work. More importantly, we need each of us to feel, reflect, work hard, encourage ourselves and gain something after practice, so that this practice can achieve his real purpose.
Self-evaluation of lathe worker training II
First, the purpose of the internship:
1, know about lathes and related safety knowledge.
2, familiar with the basic operation method of lathe.
3. Look at the drawings and actually feel the steps of operation.
Second, the internship requirements:
Make the file handle according to the drawing requirements.
Third, the internship materials:
(A) Turner theory
1. What is a lathe worker?
Workers or jobs who operate machine tools and process mechanical products on them.
2. The concept of turning.
A cold working cutting method that changes the size and shape requirements of the workpiece blank through the rotating motion of the workpiece and the feeding motion of the tool.
3. What are the main sports?
The rotation of the workpiece is the main movement.
4. What is auxiliary exercise?
The feed motion of the cutter is an auxiliary motion.
5. Model standard of lathe. CW6 140- 1000，750
Where c stands for lathe type w stands for feature code (general) 6: composition code 1: model code ordinary lathe 40: main parameters allowed machining diameter110400 mm (mm)1000: machining length.
6. Lathe processing range.
Lathe excircle, lathe end face, lathe inner hole, lathe cone, drilling hole, reaming hole, drilling center hole, lathe special contour, grooving, cutting and turning various threads, knurling, cold coil spring, etc.
7. An important part of lathe. Spindle gearbox, feed box, carriage box, tool rest, change gear box, tailstock, carriage, three-bar, lathe bed and accessories.
8. The motion system of lathe mainly moves: motor → pulley → headstock gear box → spindle → chuck → workpiece rotation.
Auxiliary motion: motor → belt pulley → gear box of spindle box → polished rod or screw rod → carriage box → carriage → tool rest → lathe tool for vertical and horizontal linear motion or turning various threads.
9. Lathe maintenance: lubrication: work with lubricating oil. Inspection: the working time and space turn for 2-3 minutes. Anti-smashing: knocking on the lathe is not allowed. Stop and change speed: the machine tool must stop. Civilized production: clean machine tools and environmental sanitation after work. Turn off the power: ensure safety.
(2) Safe operating procedures:
1. Wear work clothes to work. Girls should wear hats and wrap their hair in them. Do not operate with gloves.
You must concentrate on your work, and you are not allowed to leave the machine tool or do work unrelated to turning. Hands and body should not be close to rotating workpieces and lathe parts.
3. The workpiece and turning tool must be installed firmly, and it is not allowed to stop the rotating chuck by hand.
4. When the lathe is started, it is not allowed to measure the length of the workpiece, nor to touch the workpiece by hand.
5. After the workpiece is clamped, remove the chuck wrench to avoid flying out and hurting people.
6. Not allowed to go to work on duty, AWOL.
7. It is forbidden to change speed when driving.
8. When turning, the small tool rest should be placed in a suitable position to avoid collision with the turntable.
9. Use a special iron hook to remove iron filings, and direct removal is not allowed.
10. Teachers should criticize and educate those who violate safety regulations. Those who don't listen to education and repeatedly violate the regulations should be reported to the department for necessary treatment, and the internship score should be zero.
(3) Processing technology:
Processing technology of file handle
Serial number processing step processing data processing tool
1 lathe excircle blanking160 ~170mm15 mm× φ 30+0.590 excircle turning tool and vernier caliper.
2. Mark the lathe steps 30, 70, 75, 80,11530mm× φ 22 (22.5)10mm× φ17 (17.5) 90 away.
3 turning arc R=35mm arc R= 105mm arc turning tool arc template vernier caliper
4. Dress emery cloth polishing file, emery cloth and vernier caliper with plastic file.
Four, the lathe operator's experience:
Metalworking practice is a highly practical technical basic course and an important practical compulsory course for science and engineering students to learn process knowledge, cultivate engineering consciousness and improve their comprehensive quality. After this short metalworking internship, I gained a lot.
Lathe uses the rotation of the workpiece and the movement of the tool to process the surfaces of various revolving bodies on the lathe. First of all, the teacher asked every member of our group to be familiar with lathes. Then explain it to us on the spot, let us know the composition and use of horizontal lathe, the types of turning tools, commonly used tool materials, the basic performance of tool materials, the composition and main geometric angles of turning tools, and learn the installation of turning tools and the method of installing workpieces with three-jaw self-centering chuck.
Then the teacher showed us the operation method of the lathe and the section of the blank lathe. Finally, start practicing the operation independently. Although the operation technology was not very skilled at first, we finally succeeded after several exercises and mutual learning by team members. Looking at the artifact we made, we are very happy and have a sense of accomplishment. At the same time, we also realize that it is not easy for engineers and workers.
After the lathe work practice, we are familiar with the basic knowledge and technology of lathe work, and have mastered the necessary basic operation skills. This internship made me understand that "as long as we are willing to work hard, have the courage to overcome all kinds of difficulties, are not afraid of hardship and fatigue, practice hard and persevere, we will succeed in the end."
Self-evaluation of lathe worker training III
A week's internship as a lathe worker will soon be over. Looking back on the knowledge and skills learned in the past week, I am deeply touched.
First of all, theoretical knowledge and safety education are essential. Before turning the lathe to cut parts, the teacher spent a whole day teaching us theoretical knowledge. Although the first day was boring, it was only one of the most important materials. For example, when clamping a tool, the vertical distance between the blade and the bottom of the handle is 143.5mm, which reduces the number of times the tool is aligned with the center of the part. When installing tools, the gasket is directly measured with a ruler, and after 143.5mm, it is basically equal to the center of the part, which saves the time for tool alignment.
When clamping the workpiece, it must be tightened with a booster to avoid accidents caused by parts flying out, and use tools correctly. It is also a necessary assessment for each student to practice lathe before each internship. Only by shaking the big and middle drag plates skillfully can we make necessary preparations for turning parts and avoid the collision between tools and parts. Because the lathe we practiced this time is different from the lathe we practiced on the job, there are differences in automatic feeding and speed adjustment. After understanding some theoretical knowledge of lathe, the next day, we began to formally process parts.
I still feel very nervous when I turn to the first part, and I am so careful to avoid mistakes at every step. One grid of the big carriage represents 1mm, and the middle carriage and the small carriage are 0.02mm. When turning the end face, when it is about 2 mm away from the center, stop the automatic feed and change it to manual feed to prevent the cutter head from being damaged. When rotating the excircle, the automatic feed should be stopped at a distance of 2mm from the dimension, and the manual feed should be changed to prevent the parts from turning over and damaging.
The first and second parts are rotated by the stepping shaft, mainly to let us master the control of the excircle and the use and reading of the micrometer. When measuring parts, vernier caliper and micrometer must be used together, and the micrometer should be used to measure within the specified size of 65438±0mm, which can effectively control the size of the excircle. When the finish turning occurs again, you must first try to cut and measure it to see if the size is within the range, so that the precision of the machined parts is relatively high.
The third part is tapered and needs to turn the necessary dial. When turning, first shake the big carriage to the specified scale, then aim the middle carriage at the tool, then the small carriage exits and the big carriage does not move. Finally, after adjusting the scale, use a small carriage to manually feed and turn out the taper. First of all, you need to try to cut, measure with a universal square, and continue to rotate the tool while ensuring the correct angle. If there is a gap at the small end, it means that the angle is increased, otherwise it is small, and you need to readjust the degree and try again. Before machining the taper, the parts must not be removed from the chuck, otherwise the turned taper will deviate from the concentric axis of the circle and produce a taper curve.
The last day's processing is just some boring basic operations. First of all, drilling is necessary. When using a drill bit, coolant must be added. When the drill bit enters the parts and drills through, it should be slow to prevent the drill bit from shaking and the drilled hole is too large, which should not be larger than the diameter of the drill bit. When boring, the main deflection angle of boring tool is 91~ 93. When rotating, it is roughly the same as the outer circle, but in the opposite direction. When measuring the size, you need to use an inner diameter dial gauge to measure it.
Generally speaking, the first week's internship went smoothly without much difficulty. After all, it was because of the previous internship, and the turning part was also practiced before, mainly because the length of the parts was not controlled enough. Look forward to continuing to work hard next week!
Self-evaluation of lathe worker training 4
First day at work. After meeting in front of the factory next to the 24th floor in the morning. The others scattered and fled. We will meet the difficulties. The lathe worker went! ! After entering the workshop, we have a great feeling: Tianda is one of the real engineering colleges. Anything that looks bad can be used (and generally works). The windows that look shabby outside are as flexible as the new goods in the dormitory. And because this kind of window is almost never seen before, it adds surprise and freshness. Go to the middle of the workshop, climb the "cupboard table" with all kinds of turning tools and exquisite workpieces, and listen to the teacher's teachings. The first sentence the master said will always be remembered: turning is the most dangerous. I met you as soon as I came up. Therefore, we must pay attention to safety, and girls must wear safety helmets (that is, military training hats). This phone is too scary! Let the flowers look pale, let the grass look twisted, and make every thin heart nervous. If the group is divided, it will all be scattered. Ben San and seven other people were lucky enough to get together and follow Master Meng. The master is not tall, but he is round everywhere. Except that the head and soles of the feet are flat, the lines on the whole person are almost arc-shaped. Use a disrespectful metaphor (note: teachers are generally described as disrespectful. But please believe that these teachers have a lot to respect and learn from. Like jujube stones. Unlike most frightened little people (us), the owner wears short clothes: T-shirts and sandals. It really relieved us a lot: after all, we can see from the master that he is not afraid. Who are we afraid of with master here? When the master opens his mouth, he speaks Tianjin dialect and is amiable. Add to us.
Confidence index. After listening to the introduction of lathe, I assigned a lathe and began to practice shaking table. Three directions, three handwheels. Started the first close contact with the machine tool. I was lucky to be assigned to bed 6 (which started smoothly). It was very easy to use and spent four happy days with me. 90% satisfaction, weakness is turning tool. In the first 5 minutes, shake it; Five minutes later, run and run. We began to compare the feel of the old and new beds and handwheels. Take a closer look. Well, there are four kinds of eight beds. Although similar, contrast is absolutely necessary. Fortunately, the master followed me for a long time. Let's try it one by one. After about 30 minutes, the real work began! Beautiful!
First, the master drilled holes and cut materials for the performance. As the first person to eat crabs, I experienced a drill and a cut. Almost effortless. It is a bit incomprehensible to see that steel, which is usually considered unattainable, is so easy to process. After that, they distributed materials and went back to their beds to do "private work". Knock the hammer down first. I have experienced the process of rough turning first and then fine turning, and it takes half an hour to squat on an immobile car cone. Our waist and legs were tested. It's not easy! ! ! It took about two and a half days. Our hammer handle is finished (our group also has two defective products, my pocket type and another classmate's creative type). But they all have something to watch. Please call 168477 for specific symptoms. It's all hard work And then enter the real private life time. Each of us should be a part of a vise. The teacher assigned the two most difficult parts to two people who clamored for the simplest part (this distribution method was recognized by everyone) and began to work! ! We have a short time to make every part, but the time limit is very long. So the rest of the time we talked about eating everywhere. From Tianjin to Fujian, I told all the delicious foods in the world. Our tired legs for four days (I won't explain) and our long-suffering intestines (because the smell of engine oil is horrible and we can't eat anything, so our intestines are very painful) have been comforted mentally. Goodbye, Turner!
Self-evaluation of lathe worker training 5
A two-week metalworking internship. During this period, we came into contact with the basic operating skills of machining. With the patient and meticulous teaching of teachers and our active cooperation, we did not have any serious injury accidents, basically reached the expected internship requirements and successfully completed the internship task.
Before the internship, I heard from my classmates that I was tired, but on the first day of the internship, I came to the internship center with excitement and curiosity. I look at these huge machines and I find it difficult to operate them. I wonder if the teacher can operate it after teaching. In short, I am somewhat uneasy and somewhat looking forward to it. Our classmates are probably curious, too, and feel around on the machine. Next, the teacher told us the basic task and purpose of this internship, and repeatedly emphasized the safety issue. Finally, there are lectures and demonstrations.
We mainly study lathe work. As soon as we entered the operating room, we knew that the operation should not be easy. As a result, the teacher also said that turning is the hardest. I told myself at that time that my hands-on ability was not strong, so I must listen carefully! Lathe uses the rotation of workpiece and the linear and curvilinear motion of cutter to process workpiece. As far as the basic information of its work is concerned, it can be turned into an external circle. Inner circle, end face, cutting, slotting, inner and outer conical surfaces, all kinds of threads, knurling, molding surface, etc. After the teacher's introduction, I understand that the following points must be paid attention to when installing turning tools:
First of all, the protruding length of the turning tool fixture on the tool rest should be as short as possible to enhance its rigidity.
Second, the number of gaskets under the turning tool should be as small as possible and placed neatly.
Three, turning tool tip should be at the same height as the lathe spindle center.
Installation of workpieces:
First, the elongation should not be too long, which will affect the clamping rigidity.
Second, the clamping must be firm and reliable to prevent the workpiece from flying out and hurting people. If necessary, use afterburner.
Third, pay attention to alignment and tightness when clamping blank workpieces. At the same time, there are also methods of cutting three elements, selection of cutting parameters, excircle, end face and steps of hand-cranked car. Finally, the teacher also talked about the internship task and introduced the process steps of processing this part. I listened carefully for fear of missing a little. Finally, I demonstrated it on the operating machine, and I watched it carefully. The teacher's task has been completed, and then it's our turn to operate it ourselves. We work in groups of three, and each of us has to process a simple part.
At the beginning, our familiarity with machine tools was not enough, which led to our slow processing speed and frequent mistakes. Because the machined parts require high accuracy, they have to be scrapped again if they are not careful. After a long period of processing, we will gradually become familiar with the machine tool, the processing speed will be significantly accelerated, and the accuracy will be significantly improved. At noon the next day, three qualified parts were finally processed.
In the next three days, the teacher assigned us a more difficult part processing task with higher accuracy requirements. Because of the previous foundation, our processing speed is much faster, but it needs to be accurate and more precise. Because of the previous foundation, our processing speed is higher, so we often produce waste products. After hard work, under our careful processing, the task was completed and the parts were successfully made.
Because the processing was standing, we were all tired after two weeks, but we lived a full life and learned a lot in these two weeks.
1. Understand the knowledge of mechanical manufacturing process and the application of new technology, new technology and new equipment in mechanical manufacturing, and cultivate, improve and strengthen our engineering practice ability, innovation consciousness and innovation ability.
2. Machining practice has trained us and improved our overall comprehensive quality, which not only makes us have a deeper understanding of the significance of machining practice, but also improves our practical skills. So that we can better combine theory with practice and consolidate what we have learned.
At the same time, we also learn from teachers' dedication and rigor. Some teachers will show students how to operate over and over again until the students really understand. During the internship, we also carried forward the spirit of unity and mutual assistance. Male students help female students, and students with strong hands-on ability help students with weak hands-on ability. Everyone helped each other learn from each other, not only learned how to cooperate, but also strengthened the friendship between classmates.
4. The results of our work during the internship. These incredible small parts are actually processed by themselves, and this sense of pride and accomplishment is difficult to express in words.
Machining practice made me feel the pain and joy of being a worker in the classroom for a long time, and also tested what I had learned. Machining practice made me deeply understand the meaning of life.
Labor not only transforms nature, but also transforms human mind. After this week's machining practice, I also have a deep understanding of this aspect.
1, labor is the most glorious, and only practice can realize the pain and joy of labor.
2. Perseverance, carefulness and patience.
3, serious and responsible, pay attention to safety.
As long as you pay, you will get something.
Practice is the criterion for testing truth. After a week's metalworking practice, I learned a lot of common sense and honed my will. This is another precious wealth in my college life, which has a great influence on my future study and work.
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 more needs us 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 lathe worker we contact, although it is very dangerous, it needs every student to operate and make finished products, so as to exercise everyone's courage to try. A week's metalworking practice brings us not only the operating skills that we have been exposed to, but also the skills that we must exercise after several types of work. More importantly, we need each of us to feel, reflect, work hard, encourage ourselves and gain something after the internship, so that this internship can achieve his real purpose.
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