"As the deputy director of production, I am ashamed."

After Peng Ocean finished, Dai Shenghua rushed to speak, and his mouth was to do a review, and the sad look was like how many sins were committed to the people of the country.

"12 meters excavator, is the Ministry of machinery, coal, metallurgical department jointly issued a notice of research and development projects.Our new civil hydraulic tool factory, as a mechanical system enterprise, provides matching for forest weight and is duty-bound.After receiving the notice of the Ministry of Machinery, the cadres and employees of our factory trembled in spirit and spirited, and they all said that they wanted to create a powerful valve and a competitive valve to achieve industrial modernization.

Dai Shenghua's speech does not know which show was written, flower clusters, cloud mountain fog cover, foot for ten minutes of determination, which entered the topic, began to complain:

However, due to historical reasons and the lack of our own capabilities, the task of completing the excavator hydraulic valve is difficult for our new factory.The working environment of the 12 rectaught excavator is very harsh, and the performance requirements of the hydraulic valve exceed the requirements of other products we have undertaken in the past, which puts us forward a new topic.

Although under the strong care of the leadership of the Ministry of Machinery and the Provincial Department, with the support of Linhe technicians, especially the lean technical team led by Director Peng, we completed the production task of the excavator hydraulic valve on time and submitted the finished product that meets the requirements.However, in the process of industrial experiments, the hydraulic valves produced by our factory still inevitably have quality defects, which has brought certain troubles to the industrial experiment of the excavator, and the mood of our factory-wide cadres and employees is heavy.

After receiving the official letter on the quality of the hydraulic valve, we organized the engineering and technical personnel of the whole factory, and conducted an in-depth analysis of the reasons for the possible quality problems of the hydraulic valve, and put forward a total of 17 measures to improve the quality, on the basis of which the new hydraulic valve was produced and sent to the industrial experimental site.

Peng Ocean couldn't help it, he interrupted Dai Shenghua's long talk and said, "However, the new hydraulic valve you sent, and finally the same problem, which shows that the quality of the original hydraulic valve you have not properly solved."Mr. Chairman, should you admit that?”

"We've solved part of this problem."Tao Yu rose up and helped, "We optimized the composition of the cast iron of the valve body, so that the hardness of the valve body was effectively improved, and the oil leakage caused by wear was reduced."We have also improved the processing accuracy of the valve stem, so that the inoperability of the valve stem from the state-mandated 0.3 filament to 0.2 strands...”

He head is to talk about the seven or eight parts of the process improvement, the implication is that the new private factory has been working very hard in this regard, the forest weight is too demanding is not appropriate.

Linbei heavy machine itself does not produce hydraulic parts, Peng Ocean himself is not studying this direction, at least do not understand what Tao Yu said in the end.For example, the difference between 0.3 silk and 0.2 silk, in the end, how much significance is for the hydraulic valve, people who do not do this line, it is really not good.

"We are very grateful for the improvements in those aspects that the chief of Tao has just said.However, as far as the hydraulic valve oil leakage problem this time is concerned, we asked the experts of the Coal Institute to identify them, they believe that the main reason for the oil leakage is scratches in the valve stem, which you sent to the experimental site of the technicians also confirmed.The reason for the scratches in the valve stem, according to the analysis is that the pressure sand has appeared in the process of the valve hole grinding, for this technical problem, how do you solve it?"

Peng Ocean can only say the conclusions given by the coal research institute, and the stem scratches are what he saw with his own eyes, and naturally he will not get them wrong.As for the problem of valve hole pressure sand, it can only be said that according to the caliber of experts, he is not too sure.

Of course, the concept of sand pressing, Peng Ocean must know.The surface of the cast iron material is distributed with some carbon graphite points, commonly known as soft points, which is named because the material of these places is softer than elsewhere.When grinding the surface of the cast iron workpiece with diamond, some small diamond sand grains will be embedded in these soft points, which is called sand pressing.The presence of sand pressing phenomenon will cause the burr-like protrusion on the surface of the casting, and when the valve stem moves on such a surface, it will produce scratches and lead to oil leakage.

This truth is simple to say, but what is the matter in the production of hydraulic valves requires some professional background, and Peng Ocean is undoubtedly lacking this background.

Hearing Peng Ocean talk about the sand pressing thing, Tao Yu hesitated a little, and then nodded: "The problem of sand pressing ... of course, it must exist."Do cast iron grinding, where does not produce shovelic?These hydraulic valves submitted to the forest weight, we have carefully manually cleaned sand, has done the maximum removal of inlay sand.As for the final or individual residual sand, this is inevitable, such a small sand particles, the naked eye can not see clearly, simply with tools to remove, which can not leak the net?"

"So, as long as it is hydraulic parts, the sand is inevitable?"Peng Ocean asked.

Of course, Tao Yu will not talk about death, he shook his head and said: "This is not necessarily, sometimes lucky, clean sand, then there is no sand."Also, if it is done by grinding process, without grinding, there will be no pressed sand.”

“Then why not grind?”Peng Ocean felt that he had caught the loophole in the other person's words and asked anxiously.

Feng Xiaochen sat quietly beside him, but sighed helplessly in his heart.He knew that Tao Yu proposed the honing process method, which itself was a plowing a pit waiting for Peng Ocean to jump in, and Peng Ocean really got into it because he did not understand this technology.

"In fact, many of the hydraulic parts produced by our factory are also made by grinding process."Tao Yu said lightly, "These things with the honing process will not appear to be pressed sand."However, the 12-meter excavator hydraulic valve this product, can not be refined with the honing method, because the honing method on the prefabricated hole geometry requirements are very high, if the prefabricated hole geometric accuracy is not enough, the honing workpiece hole is difficult to do precision.Our hydraulic valve shape is special, casting process is complex, so the geometric accuracy of the workpiece itself is relatively poor, if you use the honing method, eventually I am afraid that even the current quality can not be reached."

"This..." Peng Ocean was choked at once, this is the short board of the layman.He didn't even know if the set of Tao Yu said was true, but people said it in such a circle, how could he refute it?At this time, he realized that the other party took the initiative to mention the honing method, in fact, it was to transfer his thinking and let him make mistakes.Once he said the wrong thing, the other side reasoned to refute it, he could not go down.

Seeing Peng Ocean's speechless, a man of the new civil factory was relaxed and a little, it seems that the people sent by Linbei Heavy Machinery were just that.

To say that Linbei Heavy Machinery and New Civil Factory are not a systematic enterprise, nor in the same province, the two can be said to have nothing to do with it, so the leaders of the new private factory do not need to care about the attitude of Linbei Heavy Machinery.The 12-mile excavator development project is carried out by the Ministry of Machinery, the Ministry of Coal and the metallurgical bureau, the new private plant is a mechanical system enterprise, belonging to the Mingzhou Provincial Machinery Department, and the Provincial Machinery Department is the subordinate of the Ministry of Machinery, so the new private plant also has a responsibility in this matter.

The three ministries jointly carry out research, the mainframe factory Linbei heavy machine is the coal department of enterprises, the other two ministries are mainly responsible for supporting, there are some competing meanings between each other.If the new factory loses the chain in this matter, and finally loses the face of the mechanical department, the mechanical department will certainly be unhappy.In order to make Linbei heavy machine not to complain to the mechanical department, we must block the other side's mouth, Dai Shenghua, Tao Yu this truth, so that Peng Ocean has nothing to say, this is the victory of the new private factory.In the future, if the Ministry of Machinery wants to pursue this matter, the new civil factory also has something to say.

Peng Ocean knew that he was fooled, wanted to take back the words he had just said, and then went back to say the grinding and pressing sand, but he did not know where to start.He turned to look at Feng Xiaochen and said, "Little Feng, isn't the general manager also telling you about the sand pressing, what do you think, you can say it."

Peng Ocean is the meaning of the disease rush to the doctor, he also did not want to think, he himself has been the new people around the people, Feng Xiaochen is also a young man less than 20 years old, and no enterprise experience, how can say what weight?If there is any joke, they will come here.

Feng Xiaochen's heart for the new folk factory's explanation is not convinced, the grinding process does have the hidden danger of pressing sand, but if the grinding tool is selected properly, the granularity of the diamond sand is correct, and the sand cleaning and polishing process are strict afterwards, which can completely eliminate this defect.In the end, either the technology of the new private plant is not off, and the grinding process is not deep enough, or the labor time is not enough, or the quality control is not strict, which will appear such an obvious sand pressure phenomenon.These questions, Peng Ocean is not clear, Feng Xiaochen is aware of it.

However, Feng Xiaochen did not intend to shudder to the new people's factory at this time, after all, he has not seen the production process of the new private factory, there are some problems, he does not know.Sand pressing is only one aspect of the hydraulic valve defect, although the current exposure is this problem, but who knows if there are other problems?At this time, all attention is focused on the problem of sand pressing, which is inevitably a headache, and the pain of the foot.

Thinking of this, he smiled at the crowd and said, "I don't know much about technology, this time to Director Peng as an assistant, mainly to learn from the big brother of the new people's factory."When it comes to sand, I’m not saying right now.I think that the director of He Factory and the director of Dai can give us a chance to visit the production process of the new private factory on the ground, and I am sure we will learn a lot from it."