This fitter is the main type of work in the factory now, and it is an indispensable type of work.
Fitter has three major advantages: flexible processing, the ability to process parts with complex shapes and high precision, and low investment.
There are also two shortcomings: low production efficiency and high labor intensity, and unstable processing quality.
The higher the level of fitters, the higher the quality of the parts they process and the lower the error rate.
For fitters in this era, the shortcomings are not considered shortcomings.
First of all, the first point is that processing is flexible. In situations that are not suitable for mechanical processing, especially in the maintenance of mechanical equipment, benchwork processing can achieve satisfactory results.
In the early days of the founding of the People's Republic of China, many machines were very scarce, and most parts were basically made manually.
Heavy industry is very backward and mechanization is basically non-existent, so what should we do?
It is by relying on these fitters to polish them bit by bit, and rub mushroom bombs, tanks, and airplanes by hand.
Moreover, many parts have complex shapes and high precision and can only be processed by skilled fitters. Some are even more precise and smooth than parts processed by modern machine tools.
It can process parts with very complex shapes that even modern machine tools cannot process, such as high-precision measuring tools, prototypes, molds with complex beginnings, etc.
The third is that the training cost of fitters is low, and the tools used are cheap and easy to carry.
“The basic skills of our benchworkers include scoring, chiseling, sawing, filing, drilling, reaming, countersinking, reaming, tapping, threading, straightening and bending, riveting, scraping, grinding, machine
Assembly debugging, equipment maintenance, measurement and simple heat treatment.”
"The main tools are files, scrapers, hand drills, reamers, and bench vises."
Lin Fan introduced the skills of a fitter and the tools used.
The things that fitters of this era had to learn were no more than those of later generations, and the only thing they needed to learn was the operation and maintenance of some machines.
Mainly because there is no place to study if you want to.
"This is our fitter's workbench. This is where we place our tools, make parts, and look at drawings. This is our fitter's home."
"The operations of our fitters are mainly divided into four types: auxiliary operations, which are marking lines. According to the drawings, the processing boundaries are drawn on some blanks or semi-finished workpieces, and then the senior fitters perform the next step."
"The second one is cutting operations..."
"Third, assembly, parts and components can be assembled in time according to the drawings."
"Fourth, maintenance, repair and inspection of some equipment."
"These four operations are skills that our fitters need to master, but at this stage the first thing you learn is to use tools and learn to read drawings."
"The factory will distribute other tools to you. This vise is the most commonly used tool in our work."
"When we are grinding parts, this vise plays a very important role. When we are working, we try to put the workpiece in the middle of the vise jaw so that the workpiece can receive even force. Otherwise, it will be very difficult to grind.
It’s also prone to defective products.”
"The vise is used to clamp the workpiece. When clamping the workpiece, never hit the handle with a hammer or other objects, otherwise it will easily damage the screw, nut and the body of the vise.
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"You see, this is the smooth surface of the vise. Never use it for knocking, as this will greatly damage the performance of the vise."
"When we are processing, it is best to use force toward the fixed clamp body. Look at me, is it very convenient and easy to use force this way?"
Lin Fan explained and demonstrated to Chen Tao at the same time, very attentively.
"You can't do it formally yet, but you can learn to draw lines now."
"What is a cross-line?"
"After we obtain the drawing, we use a scribing tool to draw the outline of the part to be processed on the blank or semi-finished workpiece according to the size requirements of the drawing, and make reference points and lines."
"This scribing can determine the processing position and machining allowance of the processing surface, and can detect unqualified blanks in time. These unqualified blanks can then be remedied by borrowing materials and marking the blanks with larger errors."
"Our usual markings are divided into plane markings and three-dimensional markings."
Lin Fan then took out a blank from the workbench and pointed at the markings on it and said, "Look, the markings on it are plane markings."
He turned the workpiece over casually, pointed to several planes and said: "The combination of plane markings creates three-dimensional markings, which allows the problems of the workpiece to be displayed in front of us more objectively, and then makes corrections more conveniently."
"We use many scribing tools, including datum tools, measuring tools, direct scribing tools and clamping tools."
Lin Fan took a marking platform from the table and said: "This is a marking platform. There are fixed holes on the four sides. When we use it, we must make it stable and firm and keep it level.
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"Every place on the surface must be used evenly. Don't bump or knock it accidentally. The surface must be wiped frequently. When not in use, it must be covered with a protective cover and coated with anti-rust."
Picking up a vernier caliper, he said: "This is the measuring tool we use. This is the vernier caliper. When making workpieces, we must strictly follow the dimensions marked on the drawing. These measuring tools ensure that we maintain accuracy when polishing."
"The tools for marking include needles, planners, cards, needle discs and sample punches..."
"A drawing plan is a tool for drawing circles or arcs, bisectors and measuring dimensions."
........
I want to be lazy this afternoon. The workpiece has been submitted and there is nothing to do at this time.
Let’s train Chen Tao on the basics first, and then some simple tasks can be handed over to Chen Tao.
For example, steel rolling, some handling work, and the work of a first-level fitter.
After doing this, you will have an assistant when making workpieces.
I can also spare more time to learn more advanced benchwork, and I can also do some extra work.
Level 5 fitters can take on some odd orders, which is work outside of work.
These are unplanned workpieces given to the rolling mill by the factory or other factories. This is a benefit for senior fitters.
You can do it if you have time, but there are not many opportunities like this, maybe once or twice a month.
But you can also earn several dollars at a time, and many senior fitters are waiting for such an opportunity.
Lin Fan is no exception. Who would think too little about making money?
The basic introduction was almost done, and Lin Fan was ready to go back. Today was the Little New Year, and the factory got off work early. Lin Fan planned to buy some things to prepare for the Little New Year.
The pigs raised in the pasture have also matured. When I checked in in the past few days, I got 10 piglets and 5 sheep and cows. They have all been raised in the pasture.
However, the maturity time of cattle and sheep is twice that of pigs. They are still in the growth stage, but pigs are already ready to eat.
Lin Fan didn't plan to take it out directly. It would be better to go to the vegetable market to buy some first, so that others would not doubt the origin of his food when he was eating it. Then the jealous people would report it and he would be finished if he couldn't tell the origin.
So first go to the vegetable market to buy some pigs and bring them back to create a phenomenon for others. After others get used to it, you can safely take out the meat from the pasture and eat it.
At this time, Yi Zhonghai came over with the drawings.
"Xiaofan, come here." Yi Zhonghai shouted to Lin Fan.
When Lin Fan saw Yi Zhonghai, he walked over with some confusion and asked, "Master, what do you want from me?"
"Xiao Fan, here you go, this is not a task for our factory. I asked for it from the factory director. When you finish it, just give it directly to your workshop director."
Yi Zhonghai handed the blueprint in his hand to Lin Fan.
Lin Fan's eyes lit up. He was just thinking about picking up some outside work when this man came over.
"Thank you, sir. I have just been promoted to level five, and I now know that I can take on other jobs." Lin Fan said.
Yi Zhonghai said: "Don't worry, there will be times when you will be busy in the future. You cannot let your skills as a fitter go to waste. You must work harder and strive to get a higher level in the rating next year."
Yi Zhonghai wanted to give Lin Fan more work. Originally, this task would not have been handed over to Lin Fan. There were many senior fitters in the factory waiting for such a task.
But Yi Zhonghai is a rare eighth-level fitter in the factory, and the task he wants is very simple.
He was reciprocating the favor. Lin Fan gave him a treasure. Since Lin Fan was unwilling to accept money, he would give Lin Fan more extra tasks. In this way, Lin Fan could earn more than ten or twenty yuan a month.