Three Summaries of Lathe Training

The lathe work practice is over, but the feeling it brought 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. You are not allowed to go on duty and stick to the practical knowledge of lathes in your 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 handled them carefully. I was satisfied all afternoon, but it was still much worse than the sample the teacher showed us. Besides, my hand was scalded by hot iron chips flying out during 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 still allows students to practice in batches and has achieved ideal results. 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 we need to observe, learn and summarize it 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' lathe work practice brings us not only the operation skills we are exposed to, but also the ability we need to exercise through 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.

Summary of lathe training: three articles and two two-week metalworking internships. 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, no serious injury accident occurred, and the expected internship requirements were basically met, and the internship task was successfully completed.

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 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 content of its work is concerned, it can rotate the outer 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 know that the installation of turning tools must pay attention to the following points:

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 precision, if they accidentally produce waste products, they must be redone. After a long period of processing, we gradually became familiar with the machine tool, and the processing speed was obviously faster and the accuracy was obviously improved. The next afternoon, three qualified parts were finally processed.

In the next three days, the teacher assigned us the task of processing the more difficult parts, which required higher accuracy. Because of the previous foundation, our processing speed is much faster, but it should be more accurate and require higher precision. Because of the previous foundation, our processing speed is higher, so we often produce waste products. Through 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 ability. So that we can better combine theory with practice and consolidate what we have learned.

4. The results of our work during the internship. These once 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 my knowledge. 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. Through a week's metalworking practice, I learned a lot of common sense and honed my will, which is another valuable asset in my college life and will have a great impact 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 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 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 operational skills we are exposed to, but also the ability to exercise through 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.

Three summaries of lathe training 3. Internship purpose:

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 content:

(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 maximum machining diameter110 400 mm (mm)1000: machining length.

6. Lathe processing range.

Lathe outer circle, lathe end face, lathe inner hole, lathe cone, drilling hole, reaming hole, drilling center hole, lathe special contour, grooving, cutting, lathe 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. Lathe motion system

Main movement: motor? Pulley? Headbed gearbox? Spindle? Chuck. The workpiece rotates.

Auxiliary movement: motor? Pulley? Headbed gearbox? Polish rod or screw? Tow box? Drag board? The tool rest lathe tool moves linearly in vertical and horizontal directions or turns 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 the machine tools and environmental sanitation after work. Turn off the power: to 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. Don't go to work, don't leave.

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 content processing tool

160 ~ 170mm 1 15mm？ 30+0.5 90? Cylindrical turning tool, vernier caliper

2. The location of the vehicle step markings is 30, 70, 75, 80, 1 1530mm? 22 (22.5)10mm? 17( 17.5) 90? Cylindrical turning tool vernier caliper

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. Through the practical operation and practice of this short metalworking internship, I have 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 car. Finally, let's 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 artifacts we have worked so hard to make, we are very happy and have a sense of accomplishment, and we also realize the difficulties of engineers and technicians and workers.

Through the practice of lathe work, we are familiar with the basic knowledge and technology of lathe work, and have mastered some basic operating skills. This internship made me understand? As long as we are willing to work hard, have the courage to overcome all kinds of difficulties, be not afraid of hardship and fatigue, practice hard and persevere, we will succeed in the end? .