The workers of Liaobei Machinery Engineering Construction Group are very confident in doing a good job in "service work", but Liu Lang does not think so, their level is still far behind, and if they want to manufacture the parts and components required by Liu Lang, they must pay close attention to training.

This is easy to do, in the first half of this year, Liu Lang built a training center in Fucheng, specifically for the training of employees, not only their own employees, employees of other enterprises can also, now it is just in handy, the first batch of training trainees have more than 200 people, are the best employees of Liaobei Machinery Engineering Group, at least the fourth level of workers, the highest are to the sixth level of workers, and more than a dozen have intermediate titles, which can be described as elites.

NORINCO Group also attaches great importance to it and sends college students who just joined last year as lecturers to train and ......... them.

Well, when a young man who has graduated a year ago and is just twenty-three years old stands in front of a group of workers in their thirties and forties with at least more than ten years of work experience, even if this is a college student, the workers below are still very unhappy.

The employees of your North Industries Group are powerful, we really can't compare, let alone Liu Lang, according to what is said in the commentary, Liu Lang is today's martial saint, insurmountable, and his apprentices are also among the top 100 people in the rivers and lakes, each of them is in charge, such as that Ma Ming, the status of the rivers and lakes can be ranked in the top 30.

But what is this student? He just joined the North Industries Group last year, and he didn't even grow up, and the "martial saints" are very powerful, but no matter how powerful they are, can they teach a master in one year? Besides, we are not bad goods, and we are not first-class masters in the rivers and lakes, but there is no problem with being second-rate, so can't we be compared to a junior apprentice who has just studied for a year? This clearly looks down on us.

Now a work of "White Eyebrows" is being broadcast in the storytelling, and the workers like to listen to it very much, they regard Liu Lang as the martial saint in it, and then rank it in turn, in their eyes, this child in front of them is just a child in the martial saint's house, the level is far worse, and he may not even be able to compare with Fang Shu'an.

Although they are angry, this group of workers also knows that the other party is not easy to mess with, and they still have to give face with the support of the "martial saints" behind them, but their faces are very ugly.

The "little boy" looked at everyone and seemed to be a little unhappy.

"Ladies and gentlemen, my name is Wang Liang, and I am the lecturer of this training activity, and I and another lecturer will train you in the next week. ”

Wang Liang introduced himself first, but the people below were silent, and the scene was a little cold.

"This is a bunch of rude people, why am I so unlucky, let me come tomorrow.........!

At this time, Wang Liang was also hateful in his heart.

He is the first batch of college students who joined last year, and has improved rapidly in more than a year, and now has become the leader of that group of students, the company sent him to train the trainees is indeed a major cash-out, but Wang Liang himself does not like it! If it is usually okay, the company assigns the task he must resolutely carry out, but these two days Liu Lang personally taught everyone, teaching the knowledge of CNC machine tools, how rare is this opportunity?

Thinking of this, Wang Liang was angry, but there was no way, now these workers were gloomy, and he felt that the quality of the other party was too poor, could this mood be good?

No way, the work has to go on, bear it!

Wang Liang didn't say much, and walked to the podium, which was actually an operating table, with this kind of tool on it, and a machine tool next to it.

"Well, today's lesson is also known to everyone, that is, to solve a common problem, why does the tap break, how to solve this problem?"

Wang Liang felt that the technical content of this class was too low, he learned the most cutting-edge technology in the North Industries Group, and the results obtained in just one year were beyond his imagination, so to speak, the knowledge learned here is much more than what he learned in college, and it is very practical, and now the knowledge he wants to impart to the workers is the most basic thing, which in his opinion is as boring as a college student teaching primary school students.

Tap is a tool for processing internal threads, and it is also the most important tool for manufacturing operators to process threads, but this tool is very easy to break, is the most common problem in manufacturing, and many workers are very troubled by this, because once the fracture phenomenon occurs, it will affect the accuracy of the thread, and cause the occurrence of construction accidents at the same time, but there is no good solution.

The solution to tap fracture is a topic chosen by Liu Lang himself, because he found that there are many bad habits of workers in construction during the research process, some of these habits are caused by the workers' carelessness, and some are not solid basic skills, and this tap problem can explain most of the problems.

Wang Liang didn't talk much nonsense, and began to explain by himself.

"There are several reasons for tap breakage, one is that the quality of the tap is not good, the second is the improper selection of the tap, the third is that the tap does not match the material processed, the fourth is the bottom hole diameter is small, the fifth is the material of the tap, the sixth is that the machine tool does not meet the accuracy requirements of the tap, the seventh is the cutting fluid, the quality of the lubricating oil is not good, the eighth is the cutting speed and feed are unreasonable, and the technology and skills of the nine operators do not meet the requirements.

We don't talk about the objective reasons, but only the subjective reasons for our work, especially the solution to the broken threaded holes and drill bits

The first is to fill the lubricating oil, this process seems simple, in fact, it is very said, that is, with a sharp hairpin or chopping on the fracture surface in the reverse slowly knock out, from time to time pour iron cutting, if the hole diameter is too small threaded hole or the broken tap is too long may not be suitable, but you can try.

The second is to weld a handle or hexagon nut on the broken section of the tap, and then gently reverse it, but this method is just a bit troublesome to weld, or the same, it is not suitable for taps with smaller diameters.

The third is to use special tools, that is, the broken tap extractor, the principle is that the workpiece and the tap are connected to the positive and negative electrodes respectively, and the electrolyte is filled in the middle, which causes the workpiece to discharge and corrode the tap, and then assists the needle-nose pliers to take it out, which causes little damage to the inner hole, which is the most correct operation.

Fourth, take the steel roller to the top of the tap crack with a small hammer to knock slowly, the tap is more brittle, and finally knock it out into slag, or simpler, directly drill the threaded hole of the broken tap and bored it live, re-reaming and tapping, the method is a little barbaric, if the diameter of the tap is too small, it is not easy to make, the diameter is too large, and it is very tiring to knock up.

Fifth, the threaded hole where the broken tap is welded flat, and then smoothed, re-drilling, although it is difficult but slowly can be drilled in, if the threaded hole can be changed position, when re-drilling and tapping, it is recommended to change to the original threaded hole next to it,

The sixth is to chisel a slotted groove on the section of the broken tap, and screw it up in reverse with a screwdriver, which is difficult to chisel out of the slot, and it is even more difficult if the diameter of the tap is small.

The seventh is to drill the threaded hole of the broken tap, and then inlay a steel wire screw sleeve or pin or something, and then weld, grind, re-drill and tap, you can do basically the same, although this method is troublesome, but it is very practical, the size of the tap does not matter.

Eight is to use the electric pulse to knock off, electric spark or wire cutting can be, hurt the hole can be reamed and added wire screw sleeve, this method is simpler and more convenient, as for the coaxiality for the time being, do not consider it, unless your threaded hole coaxiality directly affects the quality of the equipment ..........