Why was the work piece that was turned out to be conical?
In July 1971, our (forging workshop) Third Company had returned from Tianhui Town. All of us moved to Tiaodeng River, which is located in the area of the Third Brick Factory in the eastern suburbs of Chengdu City. During the apprenticeship period, we still lived in the factory according to the regulations of the factory. He worked in the workshop during the day. The office was on the first floor. After work, they would rest in the dormitory on the third floor. Only the canteen is slightly further away from us, about 100 to 200 meters away. I'm the same as my master and my brothers. Most of us regard the factory as our home.
One day, after work and dinner, I went to the model room according to my old habit and prepared to turn a cylindrical work piece on the woodworking machine. This work piece had a diameter of 360mm and a length of 500mm. During the working hours during the day, I had already found a log with a diameter of 400mm and a length of 600mm in the wood pile in the workshop. Now, I placed this log on the machine, clamped it with a clamp, set up the tool, and calculated the cutting speed of the turning tool. After another inspection before the operation, he connected the power supply and turned on the switch after confirming that the operation procedure was in accordance with the regulations. He began to turn the machine.
Why did I have to go to the woodworking machine at night? The reason was very simple, because there was only one woodworking machine in the model room. During the day, many masters were fighting to use it. I'm also an apprentice, so it's not convenient for me to compete with the masters for the lathes. Within the eight hours of the day, I naturally wouldn't be able to get in. In order to consolidate the operating skills of the machine tools that he had learned during the day, he had to sacrifice some rest time and work overtime in the workshop at night. Anyway, at that time, I lived in the workers 'dormitory like everyone else. After work, I had plenty of time at night.
When the rough part of the work piece was cut into shape, I suddenly realized that the work piece that was cut out was not a cylinder like I had imagined. Instead, it was an unexpected cone. After parking the car, I carefully checked all the operations, but I couldn't find the cause of the problem. No matter how I changed the speed and amount of the knife, I still couldn't change it. The cone was still cut. There was only about 10mm left on the end of the smallest head. I didn't dare to cut it again. What I was worried about was that if I cut it again, I would have to cut it into pieces.
I didn't dare to move the car anymore. I had to shut the car and go upstairs to find my master, Shi Xingu. However, Master Shi is not in the dormitory. He went out to see his friends at night. I have no choice but to go back to the dormitory to rest.
Back in the dormitory, I lay on my bed and stared at the mosquito net on top of my head in a daze. My mind continued to play the movie, recalling that on the woodworking machine just now, every small step I operated was completely in line with the operation essentials of the woodworking machine tool. I didn't make any mistakes in every step, but why did the turned work piece have a conical shape? The more he thought about it, the more confused he became. I simply sat up on the bed and stood in front of the windowsill, staring at the brilliant stars outside the window, silently in a daze.
At this moment, the deputy team leader of our team, Master Ni, pushed open the door and walked in. When he saw my absent-minded look, he immediately came to the windowsill and asked me with great concern, What exactly happened?
I told him about what happened at the woodworking machine. The deputy team leader said,"Let's go, let's go and see what the problem is.”
We walked into the workshop one after another. My work piece was still stuck on the machine. The deputy team leader was a third-grade worker at that time, a soldier who had been transferred to the military. He did a routine check, asked me a few questions, and then began to try cutting at the end of the big head.
However, the problem was not solved. The cone was still cut out. At this time, he looked at his watch and turned off the power switch of the woodworking machine. Then he ordered me to leave the workshop immediately and go back to the dormitory to sleep.
Although I agreed verbally, in reality, I didn't listen to the deputy leader. After leaving the model room, he didn't go back to his own dormitory; instead, he strolled into the dormitory next to mine, which belonged to another third-level worker in our team, Master Liu Jiagui.
After greeting Master Liu, I told him what happened in the workshop just now, but I didn't tell Master Liu what the deputy group leader, Master Ni, had seen. (The main purpose is to listen to the opinions of other masters. I also know that this deputy team leader has just been transferred from the army. I'm afraid that if the deputy team leader really doesn't understand and betrays us in front of his disciples, it won't look good for the master.)
Master Liu immediately said," It's like this. Okay, okay. I'll go with you to take a look immediately. Maybe I might know where the problem you mentioned is."”
I followed Master Liu into the workshop. Master Liu stopped in front of the woodworking machine. He carefully checked the knife holder and the needle holder several times. She stood in front of the car window and thought for a while. He did not speak.
Suddenly, Master Liu pointed at the four bolts in the base frame of the needle and asked me tentatively,"Have you touched this part?"
"No," I answered honestly. The operating procedures only said that they had to check if the bolts such as the clamp were tightened. However, he did not mention that he had to move those bolts.”
Master Liu said excitedly,"Oh right, the reason you were looking for has been found." This was definitely the problem. You've found the right person tonight. I used this lathes this afternoon. When I was using it, I changed the angle of the needle because the work piece I turned was a cone. It was time to get off work when I was done, and I had indeed forgotten to return the needle to its normal angle. When you continue to use this machine tool, because you really don't know anything about machine tools, you will never think of restoring the needle to its normal angle. Therefore, no matter how you cut, it was impossible to cut a normal cylinder.”
Once the crux of the problem was found, the solution to the problem would naturally be there. According to Master Liu's instructions, I loosened all the screws under the needle and aimed the needle at the center of the bayonet. After checking, I returned the needle to the normal range, fixed the four screws under the needle, and used the bayonet and the needle to re-clamp the work piece at both ends of the machine.
Master Liu checked the machine several times. After confirming that my preparations were in line with the required operating procedures, he nodded at me.
I made a gesture to Master Liu, connected the power, turned on the switch, and pressed the button. He started turning again. The cone disappeared. It didn't take long before the turning of the work piece was completed. When I was operating the machine tool, Master Liu stood beside me and watched my every move without blinking.
At this moment, Master Liu took the piece that I had just turned with both hands. He held the blueprint and compared it to the real thing. He carefully checked it several times according to the main technical parameters. Finally, he excitedly told me,"Completely qualified."
I hummed a song happily and turned off the power of the lathes. After cleaning the lathes, I turned around and took the newly completed work piece. I gently placed it on my workbench and placed it properly. After roughly observing the workshop and making sure that everything was normal, he finally closed the power distribution switch in the model room and locked the door. Then, she returned to the dormitory with a clear conscience and prepared to rest.
Now that she was back in the dormitory, it was time for her to be criticized. As soon as I stepped into my dormitory, the deputy team leader followed me in.
The deputy team leader, Master Ni, closed the door and came to my side. He criticized me seriously."You're too disobedient. Your master went out to do something tonight. Before he left, he entrusted you to me and asked me to take care of you. I had already changed my clothes at that time, so it was inconvenient for me to work at night. Did you listen to me when I told you to rest? Who gave you the right? I told you to call Mr. Liu to work overtime with you. If something happens to you, how am I going to reply to your Master Shi? How are you going to explain to your parents?”
Deputy Team Leader Ni is also a good person. Since he has already said so much, I can only remain silent. At this moment, even though I was criticized by the deputy team leader, I still couldn't help but feel happy. Because tonight, I did learn a bit of real skill. Who is the honest one? I'm willing to be criticized like this even if I have to do it eight or ten times.
The next morning, when I just got to work, the deputy team leader, Master Ni, told me that I didn't ask the leader in advance last night and used the lathes without permission at night, as well as that I asked Master Liu to work overtime with me. He reported everything to the section chief, Master Yang.
Master Yang immediately called me over and asked me very seriously in front of the deputy team leader,"Is that what the deputy team leader said?”
I stood upright in front of the section chief, Master Yang, and the deputy group leader, Master Ni. I immediately replied loudly,"Yes, yes, yes. What the deputy team leader said was not wrong at all. Every word was true and completely in line with the facts.”
Master Yang smiled and said," Little Stone was wrong. He was wrong to start the lathes at night without asking for permission." However, his enthusiasm was good, his starting point was correct, and the effect was still good. If all the young men in the workshop could learn skills like him, they would soon become the technical backbone of the workshop. Wasn't this a good thing? I can't criticize Little Rock anymore. I don't see anything wrong with him except that he used the lathes at night without asking me for permission. In other words. As a section chief, I can't be happier.”
At this moment, I saw my master. His expression changed from worry to joy. I made a gesture to him. She just wanted to tell him that she was fine. Later, the master said,"If you have something to do, you'd better tell me first so that I can be mentally prepared." I'll help you speak up at a crucial time."
As a wood model worker, the woodworking planer is a commonly used consumable tool. This planer often needs to be ground. To maintain its sharpness, it was important to not get stuck.
Please look at the next section of "Grinding Plane Knife"
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