The car giant started by marrying the daughter of the king

Chapter 114 Chapter 114~115 The answer beyond expectation, challenging the two big brothers

As the first stop to confirm the production preparation progress of the new BJ212 supporting parts, Jiang Hui chose the Capital Auto Accessories Factory.

This was also the first stop for him and other colleagues to inspect the supporting factory after completing the TQC training at the Capital Internal Combustion Engine Factory.

Here, the integrated maintenance-free wheel hub bearing proposed by Jiang Hui was officially presented to everyone.

As one of the earliest designed parts for the new BJ212, the Capital Auto Parts Factory's new generation of wheel hub bearings has completed formal sample production and entered the sample testing phase.

"Chief Engineer Chen, Director Lu, Director Liang, for the new generation of wheel hub bearings, we have formulated testing standards for nine major items according to the requirements given by Jiang Lianluo before. Now we are strictly carrying out various tests according to the testing standards."

As the chief engineer of the Capital Automobile Accessories Factory, He Qingquan is personally responsible for all the explanations and clarifications today.

Of course, since Chen Qi is here, Tang Qingru, the director of the Capital Automotive Accessories Factory, must also attend the meeting, but he is not responsible for answering technical questions.

"You have developed so many test items for a wheel hub bearing?"

It's not like Lu Jianqiang had not been to the Capital Automotive Accessories Factory before, but his impression was that the wheel hub bearings had only undergone four or five tests, and were then delivered and loaded without any major problems.

I didn't expect the requirements this time to be so much higher.

This sense of anticipation arose all of a sudden.

After all, the fact that they dare to propose so many test items to inspect their products shows that the product can stand the test.

“Since we are here today to confirm the production readiness of the parts, whether the parts meet the test requirements after production is naturally a very important performance requirement.”

"Chief Engineer He, please give us a detailed introduction of each test item."

Chen Qi also became interested.

Although he is the leader of the new BJ212 project team, the actual parts design work is almost entirely supervised by Jiang Hui.

He also wanted to know what the result would be after Jiang Hui's review.

In particular, Jiang Hui took out the wheel hub bearing part very early on and personally led the technical staff of the Capital Auto Parts Factory to draw the blueprint.

He even accepted an apprentice here who was older than himself.

“Our first test is an endurance test, the purpose of which is to evaluate the service life of the wheel hub bearing unit under different driving conditions of the car.”

He Qingquan was originally planning to show everyone their factory's new products.

Based on the research and testing results during this period, He Qingquan has already felt the technical content of the new generation of wheel hub bearings, and hopes to make it a flagship product of the Capital Automobile Accessories Factory in the future.

If this company could supply wheel hub bearings to most of the domestic automobile factories, the scale of the Capital Automobile Accessories Factory would be greatly expanded.

When the new production workshop is built, the employment problems of many employees' children will be solved at once.

Against the backdrop of the large-scale return of educated youth to the city, the significance of this event was absolutely extraordinary.

“The wheel hub bearing unit is clamped using a special fixture, and the vibration sensor and temperature sensor are installed on these two locations.”

“Both radial and axial loads are applied at the wheel centerline. The radial load line must intersect the bearing rotation centerline perpendicularly, while the axial load line must be parallel to the bearing rotation centerline, and the loading arm is equal to the wheel radius R.”

“Before the test, the test bearing is loaded with a radial load of W/2, the speed is 200r/min, and it runs for 2h. This time is not included in the total test time.”

"The speed setting value of the durability test is 600r/min, with a deviation of ±5%. The ambient temperature requirement is 20℃±15℃, and the tightening torque is as specified in the drawing."

"After the test, wait for the test bearing sample to cool down, check the rotation flexibility of the bearing by hand, and preliminarily determine whether there is any sticking or peeling."

"Then we disassemble the test bearing sample, destroy some parts to observe whether the grease changes color; at the same time, we clean the bearing parts and observe whether the rolling elements and raceways inside the bearing are peeling off."

"During the entire disassembly and investigation process, we will keep photos of the overall bearing after the test, photos of the grease inside and outside, and photos of the inner and outer raceways of the outer ring after cleaning..."

He Qingquan introduced it in great detail.

He knew that all the people attending the meeting today were technical experts, and if he didn't come up with some practical information, there would be no way for everyone to feel the rigorous attitude of the Capital Automotive Accessories Factory towards the new generation of wheel hub bearings.

Everyone's reaction was similar to what He Qingquan had predicted, and they all took up pens and recorded the information.

The previous parts preparation status of each supporting factory and their current attitude will become very clear if we compare the situation before and after.

Obviously, He Qingquan's introduction of the first test of wheel hub bearings aroused everyone's interest.

"Our second test is the muddy water performance test, which is mainly aimed at evaluating the sealing effect of the hub bearing unit in muddy water environment and general driving process."

"In order to ensure the repeatability and standardization of the test, we have made special regulations on the ratio of mud and water."

"The ratio of mud and water in the mud and water performance test is water: 1L, Arizona test dust: 125g, salt: 50g."

"We plan to clarify the standard for Arizona test dust when formulating national standards in the future."

"We carry out the test load, speed and cycle period in accordance with Appendix 1 of the test standard."

"The angle between the water spray direction and the horizontal direction is 45°, the distance between the water spray port and the end face of the sealing ring is 60mm±10mm, the nozzle flow rate is 4L/min, the water spray port diameter is 9.5mm, and the number of water spray ports is 2..."

Although what He Qingquan said was very boring, ordinary people would probably feel sleepy after listening to it.

However, Chen Qi, Lu Jianqiang, Liang Yi and Jiang Hui listened with great interest.

This kind of very detailed and standardized testing regulations were previously very weak points in various supporting factories, and many technicians did not even have a concept in this area.

Today, the Capital Auto Parts Factory has not only developed this test standard, but also specified it in such detail that it can be promoted as an industry template.

After introducing the second test item, He Qingquan paused for a moment, observed everyone's reactions, and then continued: "The third test is the sealing airtightness test, which aims to evaluate the sealing effect of the hub bearing unit under certain pressure conditions."

"The test conditions are that the test bearing does not rotate, the ambient temperature is required to be 20℃±15℃, and the tightening torque is as specified in the drawing."

“At the beginning of the test, the inner ring of the hub bearing unit is tightened, the seal is pressed on one side, and the seal side is coated with soapy water or immersed in water.”

“The other side is not pressed, and 196kPa of air pressure is applied to the side where the sealing ring is not pressed. The seal is sealed for 10 minutes, and there should be no leakage on the other side.”

There are standards, data and processes!

He Qingquan's report is definitely meaningful.

Even though they have not yet visited the test site, Chen Qi and others can roughly imagine the scenario of the wheel hub bearing testing project.

"The fourth test is the flange rotation bending fatigue test, which aims to evaluate the fatigue life of the hub bearing unit flange..."

"The fifth test is a static strength test, the purpose of which is to evaluate whether the wheel hub bearing unit will break when subjected to a large load..." "The sixth test is an angular stiffness test, the purpose of which is to evaluate the elastic displacement of the wheel hub bearing unit during the car's cornering process..."

"The seventh test is the load friction torque test, which is designed to evaluate the rotational flexibility of the hub bearing unit during normal driving..."

"The eighth test is the fretting wear test, which aims to evaluate the wear of the inner and outer raceway contact surfaces of the wheel hub bearing unit during automobile transportation..."

The only sounds left in the conference room were He Qingquan explaining the test project and the rustling sound of the pen hitting the paper.

Everyone listened very carefully, and He Qingquan felt a strong sense of accomplishment.

All the hard work and efforts over the past few months have not been in vain.

Just by looking at the reactions of Chen Qi and others, you can tell that the results of this investigation will definitely not be bad.

Capital Automobile Accessories Factory will definitely stand out among the supporting factories of the new BJ212 this time.

"The ninth test, and our final test, is a bolt tightness test, which is designed to evaluate the slippage and back-out of the bolts on the hub bearing unit relative to the cam."

"The test conditions are that the test bearing does not rotate and the ambient temperature is required to be 20℃±15℃..."

“The evaluation method for this test item is that the M12 bolt must not slip or break when the torque is 150N·m.”

"M14 bolts require that the bolts cannot slip or break when the torque is 250N·m."

"M12 and M14 bolts cannot come out when loaded with a force of 4900N."

"Dear leaders and comrades, the above are the nine test standards formulated by our Capital Auto Parts Factory for the new generation of wheel hub bearings."

"Except for the endurance test, all other test results have been completed, and all performance parameters have met the design requirements."

After saying this, He Qingquan let out a long sigh.

When he was talking about those things just now, he hardly looked at the materials and just memorized most of the test requirements in his mind.

This alone shows that he has put in a lot of effort and is clearly very involved in this project.

Otherwise, there would be no way to complete this explanation so fluently.

"Wow!"

Chen Qi took the lead in applauding, and as he did so, the others naturally followed suit.

The atmosphere in the entire conference room relaxed.

Even those participants who did not understand the test requirements could feel the awesomeness of the performance and everyone’s admiration for the performance.

"This time our superiors asked us to speed up the production of the new BJ212 prototype, and I felt a lot of pressure."

"New technology, new process, new materials, the new models use many 'three new parts', I am very worried whether these parts can be produced according to the requirements."

“I didn’t expect that you would bring me such a big surprise when I arrived at the Capital Auto Parts Factory, my first stop.”

"Your sample preparation has exceeded our expectations."

Chen Qi spoke on behalf of the Capital Automobile Manufacturing Plant with a smile on his face.

"Thanks to Chief Engineer Chen for his affirmation. In fact, Jiang Lianluo has made the greatest contribution to the improvement of this testing standard to what it is today."

"He gave us a big framework and requirements, and we just implemented these requirements into specific parameters."

"Faced with such stringent testing items, the wheel hub bearings we used on the current BJ212 failed eight out of nine tests, with only the bolt firmness test meeting the requirements."

"According to our calculations, after using this wheel hub bearing, the new BJ212 will no longer need to maintain the wheel hub bearing, and it does not need to be replaced within 20 kilometers."

"This impact alone will save our country at least 200 million yuan in the next 20 years, or even more."

He Qingquan was a very good person and knew that the credit for the achievement belonged to the Capital Automobile Accessories Factory.

When drinking water, one should remember the person who dug the well. Jiang Hui has made an indelible contribution to our current achievements.

At this time, it is natural to praise Jiang Hui in front of Chen Qi and others. This is not only a way of gratitude, but also a way of dealing with people in the workplace.

Just like when the employees of the OEM accompany their leader to inspect the supplier, the supplier will definitely find an opportunity to praise the employees of the OEM.

Otherwise, you don’t know who will make things difficult for you next time.

Party A’s right to speak cannot be ignored so easily.

"I have studied the design drawings of this wheel hub bearing, and it is indeed very cleverly designed."

"Even people from FAW and Second Automobile Works would have to admit defeat after seeing this."

Lu Jianqiang also stood up and expressed his optimism about the new generation of wheel hub bearings, which was also a side affirmation of Jiang Hui's level.

After all, the drawing of this wheel hub bearing was actually drawn by Jiang Hui and everyone else.

"As an important supporting factory for the new BJ212, Capital Automobile Accessories Factory has made such a major technological breakthrough. I think it is necessary to report it to the First Ministry of Machine Building and promote our achievements throughout the country as soon as possible."

"Let the big brothers like FAW and Second Automobile Works see that our capital's automobile industry will not be any worse."

Following Lu Jianqiang's words, Chen Qi further expressed his attitude.

In today's Chinese automobile industry, the special status of FAW and Second FAW is certainly not easy to surpass.

Not to mention other things, just in terms of administrative level, he is at least half a level higher.

For example, Capital Automobile Manufacturing Plant is a bureau-level unit, but FAW and Second Automobile Works are vice-ministerial level units.

State-owned enterprises these days are very particular about levels, and state-owned enterprises and administrative departments can be transferred between them at any time.

Even if there is only a difference of half a level, it is a huge and insurmountable gap.

No wonder Chen Qi felt a little resentful.

With the two big bosses setting the tone, the sample confirmation work at the Capital Auto Parts Factory this time naturally turned out to be excellent.

This is a good start for the subsequent confirmation work of other supporting factories.

(End of this chapter)