Selected Papers of Milling Training Report in 2020 (I)
As my last metalworking internship in college, Miller has a strange feeling that he should focus on 100% in the last class. The teacher gave us a detailed introduction to the relevant knowledge of milling workers and the types, principles and usage of milling machines. Milling machines are divided into vertical and horizontal. The workpiece to be processed is clamped on the flat-nose pliers of the workbench, and the horizontal, vertical and up-and-down movements are controlled by the feed turntable, while the cutter remains motionless, just the opposite of the lathe. After being familiar with the working principle and operation of the milling machine, the teacher gave us the task of cutting a cylinder into square rows, requiring the side length of the square to be 29 mm We clamped the workpiece on the flat-nose pliers, and then turned the turntable to control the position of the flat-nose pliers. When the cutter is basically in the center position, the cutter begins to align. After alignment, the turntable rotates for two and a half turns as required, and the machined workpiece can rise by 6. Milling practice report. 5mm, you can start processing the workpiece. In a short time, a standard square was born on the milling machine under the cutting of the cutter.
Milling has high machining efficiency and is a common tool for metal cutting. It is widely used in production. I hope I can have more opportunities to participate in this practice in the future and constantly enhance my practical ability.
Internship steps:
1. In the first theoretical lesson, the teacher first emphasized the matters that should be paid attention to during the operation of the milling machine. Then the teacher introduced the concept, characteristics, processing range and related physical quantities of milling in detail, and led us to visit and explain the components of horizontal and vertical milling machines. After contacting and explaining the above contents, the teacher led us to the front of the milling machine and introduced in detail how to clamp the workpiece and related operations, and how to carry out plane milling.
It's time for practice. Let's work in groups of five. Don't grind the plane on the milling machine. From the simplest start and stop, to the clamping of the workpiece, to the right knife, and finally to complete the processing of the workpiece, our group has achieved gratifying results. Milling practice report.
3. Since we started milling the plane on the vertical milling machine, our group has exchanged machines with other groups, and we practiced on the horizontal milling machine. The horizontal milling machine has a fast milling speed, but unfortunately, the oil pumps of two horizontal milling machines in our school are broken, and the automatic movement of the workbench in the horizontal, vertical and vertical feed directions is also broken. Fortunately, we are well staffed. Finally, with our joint efforts, one qualified workpiece was born smoothly.
4, the second day of internship, the difficulty has improved. In the theoretical class, the teacher explained the commonly used tools on the milling machine, their characteristics and usage, and explained how to mill grooves, and then we started work. The machining of groove is much more difficult than the machining of plane. In order to ensure the accuracy of the workpiece, we are careful everywhere and every operation is meticulous. As a result, some workpieces are still unqualified, which may be the reason of the tool!
5. The connection between the plane and the groove has ended. We also started our small experiment, finished the processing of the workpiece within the time specified by the teacher, and finally passed the test smoothly after some efforts.
6. On the third day of internship, it was even more difficult. At first, we had to practice milling step surfaces and bisecting parts, but time was limited. We only practiced the milling steps. By the way, we only used Universal dividing head to divide the parts, and we didn't machine them on the milling machine.
Internship summary:
1, through three days' practice, we have a deep understanding of the characteristics and processing range of milling, the composition, working principle and use of milling machine; Have the ability to independently measure workpieces, process planes and grooves, and replace and install tools; Achieved the purpose of internship.
2. The operation of the milling machine is simple and easy to learn, but we must not slack off in the operation process to prevent accidents.
3. Milling is one of the commonly used methods in metal cutting. Because the main movement of multi-edge multi-cutter is rotation, the milling efficiency is high and the machining range is wide. On the other hand, the dimensional tolerance grade of milling workpiece is generally it9-it7, which has low surface roughness value, is suitable for mass production and has low cost. Therefore, milling has been widely promoted in metal processing. I believe that with the rapid development of science and technology, milling will surely open up new glories for industrial production with its strong vitality.
Time flies, and half a month has passed in an instant. The experience I gained from this training is:
Through this internship, we learned about the production mode and technological process of modern machinery manufacturing industry. Familiar with the main molding methods and processing methods of engineering materials, the working principle and typical structure of the main equipment used, the use of fixtures and measuring tools and the safe operation technology. Understand the knowledge of mechanical manufacturing process and the application of new technology, new technology and new equipment in mechanical manufacturing.
③ In the process of understanding, being familiar with and mastering certain engineering basic knowledge and operation skills, we have cultivated, improved and strengthened our engineering practice ability, innovative consciousness and innovative ability.
This internship made us understand that we should be careful and not careless. At the same time, it also cultivated our strong and unyielding nature, and never gave up perseverance until the last second!
⑤ We have cultivated and exercised our views on labor, quality and economy, strengthened our awareness of observing labor discipline, safety technical regulations and caring for property, and improved our overall comprehensive quality.
⑥ During the whole practice, the teacher was very strict with our discipline, formulated the students' practice rules, and at the same time strengthened the requirements of cleaning the machine tool site and observing the safety operation rules of various types of work, which played a very good role in promoting the cultivation of students' comprehensive engineering quality.
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. The three-week metalworking practice brings us not only the operational skills that we have been exposed to, but also the ability that needs to be exercised 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.
Proceedings of 2020 Milling Training Report II
1. internship purpose 1. Understand the technological characteristics and processing range of milling.
2. Understand the composition, movement and use of commonly used milling machines, and understand the general structure and usage of commonly used milling tools and accessories.
3. Be familiar with the milling processing method and measuring method, and know how to use the indexing head for simple indexing processing.
4. Fix the workpiece and cutter on the milling machine correctly to finish the milling of plane and groove.
Two. Practice equipment
1. Milling machine is a machine tool for milling workpieces with milling cutters. Milling machine can not only mill planes, grooves, gear teeth, threads and spline shafts, but also process more complex contours, with higher efficiency than planer. They are widely used in machinery manufacturing and repair departments. On the milling machine, they can process planes (horizontal and vertical planes), grooves (keyways, T-grooves, dovetail grooves, etc. ), toothed parts (gears, spline shafts, sprockets, helicoids (threads, spirals). In addition, it can also be used to process the surface and inner hole of the rotary body and cut it off.
2. Milling cutter-There are many common types according to the purpose. ① Cylindrical milling cutter: ② Face milling cutter: ③ Vertical milling cutter: ④ Three-sided milling cutter: ⑤ Angle milling cutter: ⑤ Saw blade milling cutter; The structure of milling cutter is divided into four types. ① Integral type: ② Integral welded tooth type: ③ Inserted tooth type: ④ Indexable type:
3, maintenance and maintenance of milling machine:
1, pre-shift maintenance:
Check the important parts.
Wipe the exposed rail surface and lubricate all parts as required.
Idle and check whether the lubrication system is normal. Check the oil level, the oil level should not be lower than the oil level, and fill all parts with lubricating oil.
2. Maintenance after work:
Do a good job in cleaning beds and components, and clean up iron filings and surrounding environment.
Wipe the machine tool.
Cleaning agent, clamp, measuring tool.
The ministries returned to their positions.
3. Machining of internship parts
Since last Monday, we have started the practical training course for milling workers. Due to the limitation of school equipment, we are divided into morning shift and night shift, working in groups of three, processing a V-shaped part and completing the training course of equal parts!
Trial training steps:
On the first day of class at 1, Mr. Wang showed us the structure of the milling machine, and let us know the structure of the milling machine, the purpose of each part, the processing range and so on.
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