Military Heavy

Chapter 414 Hope is shattered
The machine tool stopped.

The master worker operating the machine tool took a high-pressure air gun to blow off the coolant, iron filings and other things on the box cover, and then carefully looked at the appearance.

Nodding lightly.

From the appearance, there seems to be no problem. The precision positioning holes are processed very beautifully and very smooth. What about their size and position?

The master master took the vernier caliper to measure the depth of these holes, and reported loudly: "The depth and size of each hole are all qualified."

Then, measure the size of each hole with an inner dial gauge, that is, the diameter of the hole.Measured very carefully and very slowly.

Because these are precision holes, the machining error requirements for each hole are very small, the precision requirements are extremely high, and the hole diameter tolerance is only two and a half wires.

Such a small tolerance is also one of the reasons why processing is relatively difficult.

The higher the processing requirements, the greater the difficulty of processing, and the difficulty of measurement also increases accordingly. It took at least several minutes to measure the diameter of these holes.

The whole scene actually fell silent!
No one spoke, no one made a sound, only the sound of some machine tools around. In such an environment, the old master finally completed the aperture measurement of these holes.

He breathed a sigh of relief.

Hui reported loudly: "Mr. Gu, the apertures are all qualified!"

As soon as the voice fell, several young people couldn't help shouting excitedly, the apertures were all qualified, that's great!
The atmosphere at the scene seemed to be different. It was a lot more relaxed all of a sudden, it was no longer so depressed and heavy, and it seemed to see the hope of success.

Gu Zhengxin's expression didn't change much. He knew that although the hole diameter requirements were relatively high, in fact, the most difficult part of processing was to ensure the positional accuracy requirements of these holes.

And the requirements for location are extremely high!
Only when the position is qualified can the processing be considered qualified!
Gu Zhengxin looked at the unprocessed two box covers next to the machine tool, then at the machined box cover on the machine tool, and waved: "Lift the box cover down and send it to our measuring point for position measurement." Measurement."

Immediately, two young workers helped. After releasing the pressure plate, they worked together to lift the box cover and carefully placed it on the trolley of the transfer box cover.

At the processing site, there is a measuring point not far away, where there is an imported three-coordinate measuring machine, some dimensions that require high precision, or dimensions that cannot be measured conventionally, such as some geometric tolerance dimensions, are basically measured there .

A large group of people arrived at the measurement point, including Gu Zhengxin.

The person in charge of the measurement point, that is, an inspection engineer, did not dare to neglect, and personally operated the three-coordinate measuring machine for measurement.

Everyone lifted the box cover to be measured to the workbench of the three-dimensional coordinate measuring machine, placed it, and then started the measurement.

The inspection engineer personally operated the three-coordinate measuring machine, and the site was quiet again, only the sound of the three-coordinate machine moving during measurement, and the slight beeping sound when the probe touched the workpiece.

The time is 1 minute, and 1 minute has passed.

It seems very long.

It took more than ten minutes, as if more than an hour had passed, and finally, the measurement was completed, and the computer next to it printed out the measurement results.

The engineer took a look at the printed measurement sheet and shook his head slightly, "Mr. Gu, the position of these holes is not up to standard. The drawing requires a position of two and a half wires, but in fact it is almost four wires. The exact result is 0.038, unqualified!"

what!
Failed!
Many people's faces changed slightly. They were full of hope, but they didn't expect such a result.

Gu Zhengxin's face also turned serious. He took the measurement sheet and looked at it carefully for two to three minutes.

None of the people around dared to speak out. Everyone knew that Mr. Gu must be in a bad mood at the moment, and he couldn't make trouble.

After reading the measurement sheet, Gu Zhengxin sighed softly, his expression darkened.

Failed!
did not succeed!

The position of these holes is unqualified!
Director Wu of the processing workshop took courage and said softly, "Mr. Gu, we still have two boxes, do you want to try another one?"

Gu Zhengxin shook his head and rejected the suggestion.

Gu Zhengxin will definitely try again if the positions of several precision holes on this box cover are within 0.03, which is only a little bit worse than the 0.025 required by the drawing.

But when the position degree reaches 0.038, the difference is a bit big. If you try again, you may not be qualified. It may still exceed 0.03, or even worse than 0.038.

Then there is no need to try again, lest a box cover be wasted.

These two box covers can only be kept. The most urgent task is to consider repairing the CNC machining center as soon as possible and put it into use as soon as possible.

As for the unqualified box cover, although the position tolerance of several precision holes has reached 0.038, Gu Zhengxin is still going to give it a try and ask the design department for advice on whether it can be used with concessions.

The so-called concession use means that the parts are unqualified, and they are used as qualified parts, and the same is assembled on the diesel engine.

What if it can be used?
With this hope in mind, Gu Zhengxin found the design department. Unfortunately, the conclusion given by them was that they did not agree to make concessions. The position error was too big. If it did not exceed 0.03, they might make concessions.

That hope was dashed again.

Gu Zhengxin returned to the office with a heavy heart, sat on the office chair, took out a cigarette, and smoked it.

While smoking, while thinking about what to do.

After smoking three cigarettes in a row, I just couldn't think of any good way.

There was a knock on the door, and his assistant came in to remind him: "Mr. Gu, you said you were going to pick up the plane at the airport. You can go now. Mr. Yang's plane will land at the provincial airport in an hour and a half."

Glancing at the wall clock on the wall, Gu Zhengxin stood up and prepared for the airport. While walking, he thought in his heart, Commander Yang and Commander Luo are about to come, and we have such a problem.

There are only three qualified tank covers, and only three diesel engines can be assembled. Alas, Dongjiang Shipyard needs four diesel engines. What will happen if we can only deliver three for the time being?
It is estimated that it will not work. Failure to deliver the four diesel engines as scheduled may affect the construction of the first ship.
Along the way, Gu Zhengxin thought a lot.

His brows were almost always furrowed, and the sadness between his brows was obvious. It wasn't until he saw the three of Yang Fan coming out of the airport that his face softened a little, and he put on a warm smile.

Yang Fan brought Han Jiang and Li Zhengjun to the provincial capital airport of Province S. When they walked out of the airport, they soon saw Gu Zhengxin coming to greet them.

Far away, Yang Fan said happily, "President Gu, you are welcome, and came to the airport to meet us in person."

Gu Zhengxin took a few steps forward, and shook hands with Yang Fan enthusiastically, "It should be, it should be, you are guests, I should greet you at the airport."

After exchanging some polite greetings, after Han Jiang and Li Zhengjun shook hands with Gu Zhengxin respectively, everyone got into the car one after another. In this morning car with seven seats, all the people in the car sat down.

Yang Fan and Gu Zhengxin sat in the middle row of seats, the car started and headed to the Hongqi factory, the two of them kept chatting about the diesel engine.

Yang Fan said: "Mr. Gu, your progress is really fast. You can start the general assembly of the first diesel engine tomorrow. It seems that the first batch of four diesel engines will be delivered as scheduled. There is no problem at all."

Gu Zhengxin smiled, a little embarrassed.

If there is no such problem, the imported CNC vertical machining center can be used, then the remaining three box covers will have been processed early, and it is estimated that they are already undergoing final inspection and are ready to be put into storage.

In fact, there are only three pieces of box covers, which are only enough to assemble three diesel engines, and the fourth diesel engine does not know what you can deliver.

Gu Zhengxin was under great pressure and suffered unspeakably.

Yang Fan didn't notice the slight embarrassment in Gu Zhengxin's smile, and introduced: "The first ship is being built at Dongjiang Shipyard, and the progress is very gratifying. It is estimated that the total section will be closed in two or three months."

After listening to Yang Fan's introduction, Gu Zhengxin felt more pressure.

Arriving at Hongqi Factory, they stopped in front of their hotel building. Gu Zhengxin accompanied Yang Fan into the hotel.

"Mr. Yang, you check into the room first. Commander Luo and the others came a little later. He arrived at our factory at about ten o'clock in the evening. He called here specially. Don't wait for him. We will have dinner together in the evening, and I will come to see you again." .”

From what it looks like, after Anton returns Yang Fan, he will leave immediately.

Yang Fan wondered slightly, is Mr. Gu so busy?
Finally, Yang Fan noticed something was wrong, and finally noticed the faint sadness between Gu Zhengxin's brows.

She asked with concern: "Mr. Gu, have you encountered any difficulties?"

He was hesitating whether to tell Yang Fan and Luo Jianguo about the matter, but now that he asked, Gu Zhengxin sighed and said the matter again.

After listening, Yang Fan's face changed slightly.

Han Jiang and Li Zhengjun looked at each other even more.

what!
At such a critical moment, Hongqi Factory actually had such a problem. The "only child" imported CNC vertical machining center had a problem, and it actually went on strike.

Yang Fan suddenly became concerned and asked: "Mr. Gu, the first ship needs a total of four diesel engines. It is the same reason to deliver three or not to deliver. You give me an account, when can all four diesel engines be delivered."

Gu Zhengxin was very helpless, showing embarrassment, "If this imported vertical CNC machining center cannot be repaired and put into use, I really don't know when I can deliver all four diesel engines."

The meaning is obvious!

Everything has to wait for the repair of the first device.

If this equipment cannot be used and the remaining two tank covers cannot be processed, then the fourth diesel engine cannot be delivered.

so serious!

It's a big deal!
Yang Fan's face suddenly became extremely dignified, and his heart was filled with worry!
(End of this chapter)