Bench fitter training report template -20xx-20xx Next semester, we had an X-week metalworking practice in Guangzhou University. During the internship, I was exposed to the basic operation skills and safety technology courses of fitter, lathe, milling and CNC, and completed the process from knowing nothing about various types of work to making a finished product. With the patient and meticulous teaching of teachers and our active cooperation, the expected internship requirements have been basically met, and the internship tasks have been successfully and safely completed.
The first job is milling. The teacher introduced in detail the relevant safety 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 bar with a square cross section into a square with a cross section of xx×xxmm, and making it according to the requirements of the drawings. We clamp the workpiece on the flat-nose pliers, and then turn the turntable to control the position of the flat-nose pliers. When the tool is basically in the center position, we start to align the tool, and then cut it 1mm 1mm, and finally achieve the specifications by fine-tuning the feed. If you are a little impatient, the whole part may be scrapped. In order to protect the cutter, it is generally not easy to stop the cutter. Milling has high machining efficiency and is a common tool for metal cutting. It is widely used in production.
The second kind of work is fitter. Bench fitter is a kind of work that makes all kinds of parts by hand, which can best exercise a person's hands-on ability. Locksmith is conducted in a separate practice workshop, with a huge workbench, and many vises are installed on the workbench to clamp various workpieces. There are various tools on the desktop, including hammers, hand saws, various files, taps, chisels, brushes and marking tools. The teacher introduced us to all kinds of knowledge of metalworking practice. What we have to do is to process the bar milled by the milling machine into a hammer. From the very beginning, use a ruler to plan lines on the bar, and then use a hand saw to cut out the general shape. Finally, file all the end faces flat, first with a rough file, then with a fine file, and keep getting closer to the score line. The assembler is very tired, but he feels a sense of accomplishment when he sees his finished product. There is no frustrated finished product, and every effort is the best finished product.
The third kind of work is drilling machine. Mainly for hammering, drilling first. The drilling machine used is a radial drilling machine. This task is relatively simple. You just need to determine the location of the drilling hole first to locate the drilling hole. However, be careful not to drill off-center or off-center. Otherwise, there will be great deviation in later tapping and installation.
The fourth type of work is CNC milling machine. First, I have a preliminary understanding of CNC milling machine under the teacher's introduction, and learn some basic programming languages in advance, such as straight line, arc, tool lifting and tool withdrawal. After grouping, the task given by the teacher was completed (milling out 1, 2, 3). In the subsequent design and production of personal handicrafts, some people also chose the rocker milling machine for processing, but only some simple straight lines can be processed, but not circular arcs. I chose the CNC milling machine, and processed a figure of "an arrow goes through the heart". I first drew a picture with CAD, and then compiled G code to design more arcs and straight lines. Adjust the tool by moving the table in XYZ direction. Then execute programming and enter automation. Debris should be cleaned up in time. The diameter of the knife should be taken into account when designing the pattern, which may be a little different from the design. Moreover, considering the depth of processing, it is best not to drill through the plate too deep. Also pay attention to clamp the plate well, don't clamp it too tightly and bend it, otherwise the milled depth will be inconsistent.
The fifth kind of work is lathe work. Lathe uses the rotation of workpiece and the movement of cutter to process the surfaces of various revolving bodies, including internal and external conical surfaces, internal and external threads, end faces and grooves. Tools used in lathes include turning tools, boring tools, drill bits, etc. When turning pins, the rotation of the workpiece is the main movement, and the transverse or longitudinal movement of the tool relative to the workpiece is the feeding movement. We listened carefully to the teacher's explanation of various parts of the lathe. Lathe is mainly composed of gearbox, spindle box, change gear box, feed box, slide box, tool rest, tailstock, lathe bed, lead screw, polished rod and joystick. The lathe is operated by each handle, and the teacher explained the function of each handle to us. The teacher first demonstrated the basic operation method and processed part of it, then let's start processing. After ensuring the tool is intact, clamp the blank, start the power supply, flatten the end face of the given cylinder, then process a hole for fixing on the end face, and then process the cylindrical surface, conical surface, knurling and rough spherical surface in turn. For the machining of spherical surface, because there is no suitable tool, rough machining can only be done by hand. In order to make the spherical surface without too many gradual changes, you can use a file to process it again to make it smoother.
After the hammer handle is over, our three-week internship life will be over, and we have benefited a lot from the teachers' words and deeds. We have not only deepened our deep understanding of various machines and mastered some basic operations, but also realized the importance of practice. Usually I only deal with books in class, but now I finally have the opportunity to get in touch with all kinds of mechanical equipment at zero distance. Although the equipment in practice often has high labor intensity and low technical content, some basic knowledge can be applied in practice. Through internship, I will continue to pay attention to the development of machinery, and always be strict with myself, pay more attention to the practical ability in life, and strive to become an excellent engineer.
Besides the workshop practice, we also had several lessons about other lathes. Let's sort out the information we learned in class and collected after class.
Shaper
A planer with a planer on the ram moves in a straight line, which is named because the tool rest at the front end of the ram looks like a bull's head. The former mainly
It is used for planing plane, forming surface and groove on small and medium-sized workpieces in single piece and small batch production.
The main motion of small and medium-sized shaper (see machine tool) is mostly driven by crank-rocker mechanism (see crank-slider mechanism), so the motion speed of ram is uneven. Large-scale molding machines mostly adopt hydraulic transmission, and the ram basically moves at a constant speed. The return speed of the ram is greater than the working stroke speed. The productivity of the shaper is very low, because it is processed by a single-edged planer and does not cut when the ram returns. The main parameter of machine tool is the maximum planing length. Shaper mainly includes ordinary shaper, copying shaper and mobile shaper. Ordinary shaper (see figure) moves horizontally and linearly by ram with planer. The tool rest can rotate at a certain angle in the vertical plane and can be manually fed. The worktable moves horizontally or vertically intermittently with the workpiece, and is often used for machining planes, grooves and dovetail surfaces. Copying shaper is to add copying mechanism to ordinary shaper to process molding surface, such as turbine blade. The ram and slide seat of the mobile shaper can also move on the lathe bed (horizontal) or vertical column (vertical), which is suitable for planing the local plane of extra-large workpieces.
The shaper is mainly used for planing planes, molding surfaces and grooves on small and medium-sized workpieces produced in single piece and small batch. Its five main features are:
1. The workbench of the shaper can rotate left and right, and the workbench has a quick moving mechanism, which can move horizontally and vertically. Used for planing inclined planes, expanding the application range.
2. The feed system of the planer adopts cam mechanism, with 10 feed. It is also convenient to change the feed rate.
3. The molding machine is equipped with an overload safety mechanism in the feed system. When the cutting overload is caused by careless operation or external force, the feed will automatically slip, ensuring the normal operation of the machine tool without damaging the parts.
4. The lubricating oil pumped by the oil pump is used for circulating lubrication between the ram and the bed guide rail, and between the speed gear pair and the main sliding guide rail surface.
5. The shaper is equipped with clutch and brake parking mechanism, so there is no need to cut off the power supply when changing speed, starting the machine tool and parking. Braking the parking mechanism can make the ram act as a clutch.
The inertia stroke in the process of separation shall not exceed xx mm
Insert bed:
Metal cutting machine for machining keyway. During machining, the workpiece on the workbench moves longitudinally, transversely or rotationally, and the cutter moves up and down to cut the workpiece.
Linear motion machine tool for inserting keyway and die hole through vertical reciprocating motion of cutter. The slotting machine, like the planer, uses a single-edged tool (slotting tool) to cut the workpiece, but the planer is horizontal and the slotting machine is vertical. The slotting machine has low productivity and accuracy, and is mostly used for single-piece or small-batch production and processing of inner hole keyways or spline holes, as well as plane, square or polygonal holes. It is often replaced by milling machine or broaching machine in mass production. The slotting machine is the only way to process the keyway in the shoulder without holes and obstacles. The slotting machine mainly includes ordinary slotting machine, keyway slotting machine, gantry slotting machine and mobile slotting machine. The ram of the common slotting machine moves up and down along the column guide rail with the tool rest, and the workbench with the workpiece can make longitudinal, transverse and rotary feeding movements by using the upper and lower slide seats. The workbench of the keyway slotting machine is integrated with the machine bed, and the cutter bar extending upward from the machine bed through the workpiece hole makes up-and-down reciprocating motion while inserting the cutter, and at the same time makes intermittent feeding motion. The installation of workpieces is not limited by columns like ordinary slotting machines, so it is mostly used to process keyways in holes of large parts (such as propellers).
Broaching machine:
A metal cutting machine for machining holes or keyways. When machining, the workpiece is generally static, and the broach cuts linearly.
The main parameter of broaching machine is rated tension.
The main parameter of broaching machine is rated tension. A machine tool that uses broach as a tool to process through holes, planes and workpiece forming surfaces. Broaching can obtain higher dimensional accuracy and smaller surface roughness with high productivity, which is suitable for mass production. Most broaching machines only have broaching as the main movement of straight drawing, but there is no feeding movement. 18xx year, xx year, j month. La xx specially built the first mechanical transmission horizontal internal broaching machine. In 1930s, Germany made a vertical double-cylinder internal broaching machine, and the United States made a large plane side broaching machine for processing cylinder blocks. In the early 1950s, continuous broaching appeared.
borer
A machine tool that mainly uses boring tools to bore existing prefabricated holes in workpieces. Usually, the boring cutter rotation is the main movement, and the boring cutter or workpiece movement is the feed movement. It is mainly used for machining high-precision holes or finishing multiple holes at one time, and can also be used for machining other machined surfaces related to hole finishing. You can also use different tools and accessories for drilling, milling and cutting, and the machining accuracy and surface quality are higher than those of the drilling machine. Boring machine is the main equipment for processing large box parts. Thread machining excircle and end face.
Fitter Training Report Template 2 Internship Content: This internship is divided into two stages: Fitter Internship Stage (in the seventeenth week) and Latcher Internship Stage (in the eighteenth week).
I look forward to internship every semester, because I can finally get rid of what is basically pure theory, to know, understand, contact and master practical things, and to feel some real things. Although the fitter internship and lathe internship at the end of this semester have little to do with our major, this internship is particularly worthwhile, not only expanding our knowledge, but also knowing and mastering a lot of new things. Let me talk about our internship.
The first week of internship is locksmith internship, internship in the afternoon, leaving before noon and coming back in the evening. It just snowed, the road was slippery, and I rode my bike for nearly an hour. When we walked to the training center, to be honest, this place was too simple. What impressed me was the teacher's serious face and high requirements. It is very cold in the classroom. The teacher didn't rest all day, ate in a hurry and caught cold with us. The teacher is old and hard. The first is safety, which should be strictly in accordance with the requirements of operating procedures and safety first. Our internship requires 2 points at the end of the term. 5*2。 5*2。 Xcm cubic iron block. After the teacher taught us tools, usage and basic operation, we mainly did it ourselves. Worktable, hacksaw, large, medium and small jigs, brushes, straight steel rulers, vernier calipers and other necessary tools were selected in one afternoon and started to be processed, but they were not finished yet, and the parts were roughed again the next afternoon. However, on the third day, when it was polished, it was smaller than the required size and failed to meet the standard, so we had to start again. Fortunately, it was completed and handed in before the deadline. When you are tired during processing, take a rest and look at the relevant books on the teacher's podium. I didn't read intensively, but I learned a lot. In the process of dealing with it, students exchange and discuss with each other, which not only enhances the friendship between students, but also learns new knowledge, killing two birds with one stone.
Machining iron blocks with hacksaw is a helpless but repetitive process. Only one piece of material needs to saw off at least six faces. Sometimes my hands are sore from twelve to five or six. But every time I finish it, I feel a little fulfilled, and I am one step closer to success.
Although this internship is not the hard work I have done, I believe it has also honed my will and allowed me to enjoy the process and experience success and joy. Polished surfaces are more unbearable than saws, because it requires not only saws, but also all large, medium and small saws! The straightedge finds the plane, and the processing requirements are very fine. Every time I grind, I feel the same joy in my heart.
My hands are full of oil during my internship, and sometimes I get it on my clothes. Iron filings and dust are flying everywhere, and my clothes are the same color as oil stains. There are iron filings in the nostrils, and the working conditions are hard and boring, but there is really happiness inside. This internship made me realize the waiting and patience, honed my will, and learned that if I want to succeed, I must step by step, be down-to-earth, not afraid of failure, and strive for perfection. In short, this internship has benefited a lot. Finally, I have some regrets. I wanted to take my week's work away as a souvenir, but I didn't send it after I handed it in. What a pity.
The second week is an internship as a lathe worker. This time our class will go in the morning instead. After that, before we entered the workshop county, we met the teacher who took our lathe worker as an intern. The first feeling is particularly cordial, because either the teacher wearing a suit and tie keeps people away from him, or he thinks the distance between the teacher and the students is very cordial and close. Like the last teacher, he first emphasized the safety problem and told us the problems that should be paid attention to when operating, such as wearing overalls, working hats and gloves. Then we talked about the operation of the C620- 1 car factory we want to operate. There are x kinds of lubrication methods for machine tools:
1, oil leakage.
2. Pour the oil.
3, oil rope oil guide
4, oil pump oil.
5. Dali Petroleum Cup
6. Butter cup, the refueling point at xx. The machine tool consists of seven parts: spindle box, change gear box, feed box, tray box, lathe bed, tailstock and accessories. Tray boxes are divided into large trays, medium trays and small trays. These three trays are used together to control the feed quantity, direction and size. The whole machine tool has xx operating handles: one controls the rotating speed, one controls the feed direction, one controls the feed quantity, one controls the turning tool and one controls the switch. The use of xx operating handle constitutes the operation process used in machine tool processing. In addition, when machining workpieces, lathes are divided into automatic and manual. When talking about turning tools, the teacher told us the shapes and names of all turning tools. Turning tools are divided into three types according to materials: K-type cemented carbide (nickel cobalt), P-type cemented carbide (nickel titanium cobalt) and M-type cemented carbide; According to the angle, there are two kinds of turning tools: xx turning tool and xx turning tool. Turning tool consists of tool body (common steel) and tool head (special alloy). The shapes that the turning tool can turn are: oblique fracture, arc, triangular thread and trapezoidal thread.
Finally, the teacher listed the specific meaning of machine tool model, such as C620-XX stands for the code designed after great improvement, X is the main parameter, X is the group code, C is the machine tool category code, cm6 125 25 is the main parameter, X is the model code, M is the characteristic code, and C and 6 in 620- 1 have the same meaning as C and 6. There are c6 140a, x6 132, b6065, b20xxa, b5020, etc.
What impressed me was that: The teacher could have taught us only the last part of the internship, but he didn't slack off. He not only talked about what we wanted to learn, but also talked a lot about lathes. He spoke very seriously on the blackboard. He personally demonstrated and introduced each component on the machine tool. Because there are too many people, it is impossible to read it all at once. He repeated it and finally gave individual guidance. In a word, I saw the teacher's heart to let us learn more knowledge. In order to let students learn more things, he worked tirelessly, which moved me very much. Finally, we not only completed the turning of parts that meet the teaching requirements, but also fully understood the use and operation methods of every part, every oil hole and every handle of the lathe. We digested and absorbed what the teacher said. Teacher, you have worked hard!
This internship is worthwhile. He taught me a lot, learned knowledge, honed my will, and personally experienced the learning method. Promote the relationship with classmates; The teacher moved me very much. Looking forward to the internship next semester.
After a semester of lathe training, I learned a lot about lathe machining. I have basically mastered the processing methods of some basic workpieces. Let me introduce the knowledge I learned this semester to the teacher. I take the processing of an m20 thread as an example to illustrate its processing method and matters needing attention.
Let me take the car ca6 140 as an example. If you want to machine threads, you must turn an mxx excircle before machining threads. Because the thread diameter of the final lathe is required to be mxx, we should make the excircle smaller than m20 by 0.2-0.3 when machining, which means that the final excircle diameter of my lathe should be xx or xx. Here I assume that the diameter of my existing rod is m30.
Now I start processing. First, I put the bar on the chuck of the lathe and tighten it. I put the cylindrical turning tool on the tool rest. Part 1 Start turning the excircle and adjust the lathe speed to 450 rpm. Turn the big and middle carriages so that the lathe tool lightly touches the end face of the bar (the lathe tool only lightly touches the bar, so that the knife and the bar will not contact excessively), and then the big carriage feeds X-XMM. When in use, the carriage feeds an end face perpendicular to the excircle of the bar, and continues to align the knife, so that the excircle of the knife collides with the material. The big carriage retracts and discharges, and then the lathe excircle begins. Here, I roughly turn the X cutter head of the skip three times to complete the X cutter. The first knife, the carriage feed, the feed size is about xmm. After machining to the ideal length, the big carriage retreats and the middle carriage does not move. The second and third knives enter xmm just like the first knife. Now, it is estimated that the final tool pitch is set to X or X by default. When cutting this knife, add a deviation of 0.02 (here, my requirement for myself is 0+0.0/-0.02).
After the above processing, I have processed the raw material into a material with an outer circle of mx-X. Next, I need to cut a groove between MX and X on the top of 20 next to X with a cutting knife, and the width of the groove is between X and xmm, and the depth is XMM (because the pitch of the car I want is X, the feed of the middle carriage can be calculated as XMM by formula, and the actual cut is 6.4). When cutting the groove, it should be noted that the groove should take root after cutting to the specified width and depth.
All the above preparations have been completed. Finally, I'm going to process the thread, and here I'm going to do the positive and negative cutting. The characteristic of this method is that the pressure on the large carriage and the switch are closed when the chuck rotates forward, and the cutter retracts when the feed of the large carriage is reversed. After adjusting the turning tool feed. Align the threaded cutter with the material, make the chuck rotate forward, make the cutter draw a mark on the material, and measure it with vernier caliper to see if it is 2.5. After the measurement, if it is qualified, you can use the intermediate carriage to feed the tool. This means that the rotation speed of the lathe should not be too high at x revolutions per minute, the maximum feed should not exceed 5mm, and the last few cuts should be around 0.0 1-0.02 each time, so as to ensure that the surface smoothness of the thread will not tear.
The above is the whole process of my thread processing. I know that what I know is only the superficial knowledge of lathe work, so if I want to learn lathe work better, I will study hard in the future.
The four-hour fitter training report template passed quickly, and the internship ended in a blink of an eye. This time is really hard, but I have learned a lot. But also let me deeply understand the great poet-Li Bai's famous saying: as long as the kung fu is deep, the iron pestle is ground into a needle! Through the 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!"
Fitter practice is an effective way to cultivate students' practical ability. It is also a compulsory course for our future senior technical workers, especially students who study mechanical assembly and maintenance locksmith. It is very important and meaningful. The fitter's internship is another opportunity for us to actually master knowledge. Without the rigorous environment in the classroom, we will feel the atmosphere in the workshop. At the same time, we feel more about the significance of being a worker, which makes us more aware of our responsibilities.
This is undoubtedly a transition between theory and practice, from safety education, action essentials, the use of tools, to the actual operation of taking files. Some things are to be explored by yourself, and some things are to be discovered from theory and applied to practice. From the beginning of polishing the plane, I understood that it is not that simple to do a good job, and it needs to be proved by practice. What you see is not necessarily true (the plane looks flat, but its shortcomings can be found by measuring light); This reminds me why the school wants us to practice here, because the school wants us to understand the value of learning. Learning needs the same meticulous spirit as polishing an airplane to do its best, and it also makes us realize the importance of hands-on. It's not enough to just study theory. Without practical experience, you can't find your own practical ability, which requires the combination of theory and practice. It needs the cooperation of mind and hands.
From plane grinding to scribing and dot; From shaping to drilling; From reaming to tapping, what I learned at every step was something that others could not take away. From here, I know what a fitter is. The main contents of a fitter are marking, chiseling, filing, grinding, drilling, reaming, reaming, tapping and so on. Understand the structure of the file; Classification, selection, filing posture, filing method and quality inspection.
Fitter practice has trained us and improved our overall comprehensive quality, which not only makes us deeply understand the significance of fitter practice, but also improves our practical ability, so that we can better combine theory with practice. Consolidate what we have learned, and at the same time let us learn the professional quality of teachers. The teacher took pains to find out the mistakes in our homework for us. We also carried forward the spirit of unity and mutual assistance and enhanced the friendship between our classmates.
During the internship, we achieved the fruits of our labor-exquisite nuts. Looking at this exquisite work, it turned out to be polished by myself, and my pride and sense of accomplishment are hard to express in words. I didn't expect that something that was so big at the beginning has now become a beautiful workpiece and has been ground out at once. This is what people say, "As long as you work hard, the pestle can also be ground into a needle"!
The locksmith's internship was short and hard, but what he learned was valuable, which made me realize the hardship and happiness of being a worker and consolidated my knowledge, which left me with good memories.
After such a three-week locksmith internship, what I learned and realized was not available to teachers in class. What is "practice makes true knowledge"? No matter how good your theory is, it will be of no help if your practical ability is poor. I believe that after this locksmith internship, I will lay a solid foundation for the next internship as a lathe worker and welder in a great sense.