Anyone who has worked as a carpenter would probably not say that he doesn't know how to file a saw blade. Now that I'm almost seven years old, I still have this habit. No matter where he was, as long as he saw a carpenter filing a saw blade, he would always be tempted to watch for a while. As long as time allowed, he would want to watch more. As I watched, I chatted with the young man who was filing the saw blade with interest. She could not help but tell him some of her experience in sharpening saw blades.
Some people might ask,"How did you come to have such experience?”This was when I was young and worked as a wooden model. I had experience in this area.
It was in March 1971. When I first entered the factory as a wood model worker and started my apprenticeship, my master, Shi Xingu, was from Shanghai. His woodworking skills were quite good, but his eyes were a little bad. It was said that it was because he had suffered from crystallites. I had heard from him for a long time that his eyes were always dry and often shed tears in the wind. He felt that it was very difficult for his eyes to see the saw blade. On the third day after I started to be his apprentice, he took out a few big saws and handed them to me, asking me to file them quickly. (Shua Shua Kuai is a Shanghainese slang. It means that he wants me to cut the saw blade.)
I took the saws and placed them on the workbench in order. I first took a piece of wood and clamped it on the hard wood clamp in front of the workbench. Then, I used another saw to cut a gap in the direction of the top of the wood. I picked up the master's saw and stuck the saw blade in the saw gap. After making sure that it was stuck tightly, I dragged a wooden stool over and sat down. I took out a brand new triangular file from the tool box and followed the saw blade's saw teeth from left to right. Following the order, he began to file the file one by one.
When he started to file the saw blade, he would always drag the file back and forth on the saw blade, relying on brute force to file, probably to show that he could file the saw blade. I did try quite hard, but the noise was louder and sharper.
One day, the section chief, Master Yang, came back from outside the model room and shouted at me,"Little Stone, can't you be quieter when you file the saw blade?”
I was in the middle of filing the saw blade. My eyes were only focused on the saw teeth in front of me. Suddenly, I heard a shout from the side. I didn't notice who was shouting. Without looking up, I replied,"It was so loud, I couldn't do anything about it.”
Master Yang, the section chief, came to his workbench, grabbed the phone on the cover of the tool cabinet, said a few words, took out a few blueprints from the tool cabinet, and hurried out. He looked at me, didn't say anything, and left the model room.
I continued to file the saw blade hard. The squeaking sound of the saw blade was sharp and ear-piercing in the model room. The people around me had to cover their ears and avoid it. I also felt that it was impossible to file the saw blade like this. I couldn't help but stop, stand up, and move my hands and feet. I took the opportunity to rest.
At this moment, Master Shi came over and told me with a serious expression,"The way you file a saw is wrong. When filing a saw, one had to look at the saw teeth in front of the saw and hold the file with both hands, one in front and one behind. He pushed the file out and lifted it up. He held the file flat with both hands and retreated. Once again, he held the file flat and filed forward. He repeated the above actions.
In other words, one side of the file should be in contact with a section of the sawtooth. After the file is close, push the file out with the forward thrust of the wrist. When the file is back, lift the file slightly. The file is not allowed to press on the sawtooth and drag it back and forth. Do not drag it back and forth on the sawtooth. If he did that, the result would be that he could not file the sawtooth quickly and it would be quite tiring. No matter how new the file was, it couldn't withstand such a process. If it wasn't done well, it would break the file and hurt people. The sharp and ear-piercing sound of the file would also directly affect the work of others around them. Didn't you feel anything just now?”
I nodded. That's right. I also felt that sharp and ear-piercing sound of the saw. It was indeed too ear-piercing and unpleasant to hear. No wonder everyone around had run away.
Master Shi took the file from my hand and asked me to stand beside him. He gave me a few demonstration while talking. Indeed, I saw Master Shi holding the file with two hands in front and behind when he was filing the saw blade. I only heard the sound of "chi" when the file came into contact with the saw blade. I immediately saw a new mark on the saw blade. Then, he lifted the file back to its original position and filed it a second time. He only filed each saw tooth twice. When he touched the filed saw teeth with his hand, he could clearly feel that the saw teeth had a sharp feeling. The result of this rubbing. It was the height of each saw blade, which was generally the same. When cutting wood with a saw blade, the saw blade would not feel jumping.
After watching Master Shi's demonstration for a while, I took the file from Master Shi's hand and imitated the way Master Shi filed the saw blade. I followed Master Shi's instructions. Sure enough, I only heard the sound of chichi, chichi, chichi. Then, next to my ears, I began to hear the sound of a file being sawed in a very regular pattern. Since I didn't drag the file on the saw blade, the sharp and ear-piercing sound of metal friction couldn't be heard, and the speed of the file increased.
When I handed the saw blades to me, I handed them to Master Shi. Master Shi took them and picked up each saw. He looked at them from one end to the other. He touched the saw teeth and checked them carefully. He nodded and said nothing. He put all the sawblades that I made into his workbench.
From then on, my master, Shi Xingu, gradually developed a habit. He often gave me his saw and asked me to file it for him. By helping Master Shi file the saw blade, I gradually learned the relationship between the saw blade, the saw teeth, and the saw blade. Before each saw blade is used, the saw blade must be cut open first. If the saw blade is cut properly, the saw blade will not be clamped when it is used to saw wood. After the road was sawed, the saw teeth had to be filed. The size of the saw teeth was the same. When using it, the saw wouldn't have a jumping motion when cutting wood.
I remember that when I was an educated youth in the countryside, I used to follow the carpenters in the production team and did some carpentry work. I saw those carpenters 'handsaws. You can't find a good one that can match my master's handsaw. There doesn't seem to be a better looking handsaw than mine.
After that, they arrived at the Mid-Autumn Academy's water conservancy construction site on the mountain. On this construction site, the hand saws of the carpenters were even rougher. There was no need to look for those saws. Anyway, those saws were from the reservoir construction site. Anyone could use it. If it was worn out, they could just throw it away. There was nothing else to do.
From this point of view, the difference was that his master's tools were his. Before us, the tools of the woodworkers. It belonged to the masters. They also had to get a tool allowance from the factory's finance department every month. Therefore, the tools of the wood molder were placed in each person's dedicated workbench. When he needed to use it, he would take it out and use it carefully. After using it, he would wipe it clean and put it away. Everyone had their own tools.
When working, the wood mold master basically used his own tools. This was especially true for the more precise tools. They were usually invisible on the workbench and could only be taken out at critical moments. Moreover, they were usually used by themselves and not borrowed. My master has a few more saws, and they look very special. I've only seen it. He still did not know how to use it. He refused to tell me. He only said. Let me see it for myself when I need it in the future.
After our batch of educated youths entered the factory, the main tools were basically all uniformly allocated by the unit. There were also some that were made by his master. As for materials, they were waste materials picked up from the corners of the factory. Each disciple followed a different master and made many tools with their own styles. All kinds of flowers bloomed. Using these words to describe the style of all the tools in our model room is the most appropriate.
After a few days of practice, I gradually mastered the basic skills of the saw blade. What kind of saw blades were those files suitable for? What kind of saw blades were they suitable for? He began to have his own choice. There was also the height of the saw blade clip and the width of the saw blade clip. He had formed his own unique method.
There is also the special tool for cutting the road. We made it ourselves. The key was to choose the right steel plate material:
First, it couldn't be too big. If it was too big, it would be inconvenient to hold it. If it was too small, it would be too difficult to use it. If it couldn't be held in the hand, it would also be difficult to use it.
Second, it could not be too hard or too soft. If it was too hard, the hacksaw would not be able to cut open the saw. There was no saw on this steel plate, so it would not be able to open the saw road. If it was too soft, it would not be able to break the teeth on the saw blade, and it would not be able to break it into a saw road. It was quite difficult to use.
Third, the gap between the teeth of the saw-cut road could not be sawed too wide. If the gap between the teeth was too wide, the saw-toothed road would not be able to be opened.
For this reason, I specially chose a small steel plate and carefully made a special tool for cutting the road. After I was done, I experimented many times. He felt that there was indeed no problem. He found an opportunity. I pulled him over to my work desk. I secretly gave it to my Junior Brother Zhang Youjun.
At the same time, I also told my junior brother Zhang Youjun about my experience with the saw blade without reservation. After my junior brother Zhang Youjun put these experiences into practice, he told his friends who came with him. The old screeching noise of the workshop gradually died away.
The model room returned to its usual calm.
Please look at the next section,"We're All in the Paper."
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