Chapter 114 Chapter 114~115 Answers beyond expectations, challenging the two big brothers
The first stop for confirming the production preparation progress of the new BJ212 supporting parts, Jiang Hui chose the Capital Automotive Accessories Factory.
This was also the first stop for him and other colleagues to go to the supporting factory to audit the factory after attending the TQC training at the Capital Internal Combustion Engine Plant.
Here, the integrated maintenance-free wheel hub bearing proposed by Jiang Hui is officially displayed in front of everyone.
As one of the earlier designed parts for the new BJ212, Capital Auto Accessories Factory’s new generation wheel hub bearings have completed formal prototype production and begun the prototype testing stage.
"General Manager Chen, Director Lu, and Director Liang, for the new generation of wheel hub bearings, we have formulated the testing standards for nine major items according to the requirements given by Jiang Liaocheng. Now we are carrying out various tests in strict accordance with the testing standards. ”
As the chief engineer of the Capital Automotive Accessories Factory, He Qingquan is personally responsible for various explanations today.
Of course, Chen Qi is here, and Tang Qingru, the director of the Capital Automotive Accessories Factory, will definitely attend the meeting, but he is not responsible for answering technical questions.
“You have developed so many test items for just one wheel hub bearing?”
It is not that Lu Qiang has never been to the Capital Automotive Accessories Factory before, but in the impression that the previous wheel hub bearings were only tested After four or five tests, there were no major problems before delivery and loading began.
I didn’t expect the requirements to be so much higher this time.
The sense of anticipation arose instantly.
After all, you dare to propose so many test items to test your products, which shows that this product can stand the test.
“Since today we are here to confirm the production readiness of the parts, then whether the parts meet the test requirements after they are produced is naturally a very important performance requirement.”
“Mr. He, that’s troublesome. Please introduce each test project to everyone in detail. ”
Chen Qi also became interested.
Although he is the leader of the new BJ212 project team, Jiang Hui is almost always in charge of the actual parts design work.
He also wanted to know what the result was after Jiang Hui checked.
In particular, Jiang Hui took out the wheel hub bearing part very early and personally drew the drawings with the technicians from the Capital Automotive Accessories Factory.
He even accepted a disciple here who was older than himself.
"Our first test is the durability test. The purpose of the test 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 them to everyone. Factory's new products.
Based on the research and testing during this period, He Qingquan has felt the technical content of the new generation of wheel hub bearings and is expected to make it a flagship product of the Capital Automotive Accessories Factory in the future.
If it can supply wheel hub bearings to most domestic automobile factories, then the scale of the Capital Automotive Accessories Factory can be expanded a lot.
When the new production workshop is built, the employment problem of many employees' children can be solved at once.
In the context of the large-scale return of educated youth to the city, the significance of this matter is absolutely extraordinary.
“Use a special clamp to clamp the wheel hub bearing unit, and the vibration sensor and temperature sensor are installed at these two locations.”
“Both the radial load and the axial load are added to the center of the wheel At the same time, the radial load action line must be perpendicular to the bearing rotation center line, and the axial load action line must be parallel to the bearing rotation center line, and the loading arm is equal to the wheel radius R. ”
“Test. Before adding a radial load of W/2 to the test bearing, the rotation speed is 200r/min and it runs for 2 hours. This time is not included in the total test time. "
"The rotation speed of the durability test is set to 600r. /min, the deviation is ±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 initially determine whether there is sticking or peeling."
"Then the test bearing sample is disassembled, and some damaged parts are disassembled. , observe whether the grease changes color; clean the bearing parts at the same time, and observe whether there is peeling of the rolling elements and raceways inside the bearing. "
"The overall photos of the bearing and the inner and outer grease after the test will be retained during the entire disassembly and investigation process. Photos, photos of the inner and outer raceways of the outer ring after cleaning..."
He Qingquan introduced it very carefully.
He knew that the people attending the meeting today were all technical experts. Without some practical information, everyone would not be able to feel the rigorous attitude of the Capital Auto Parts Factory towards the new generation of wheel bearings.
Everyone's reaction was similar to what He Qingquan predicted, and they all took pens to record information.
A comparison of the parts preparation status of various supporting factories before and what their attitude is now is very clear.
Obviously, He Qingquan’s introduction of the first test of wheel bearings aroused everyone’s interest.
“Our second test is the muddy water performance test. The purpose of this test is mainly to evaluate the sealing effect of the wheel hub bearing unit in muddy water environment and general driving.”
“In order to To ensure the repeatability and standardization of the test, we have made special regulations on the ratio of mud to water. ”
"The ratio of mud to water in the mud water performance test is water: 1L, Arizona test dust: 125g, salt: 50g."
"We plan to clarify the standards of Arizona test dust in the future when formulating national standards."< br>
“The test load, rotation speed and cycle period are carried out in accordance with Appendix 1 of the test standard.”
“The angle between the water spray direction and the horizontal direction is 45°, and the distance between the water spray port and the end face of the sealing ring The distance is 60mm±10mm, the nozzle flow rate is 4L/min, the water nozzle diameter is 9.5mm, and the number of water nozzles is 2..."
Although what He Qingquan said is very boring, ordinary people I probably felt drowsy 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 was a very weak point of all supporting factories in the past. Many technicians did not even have the concept of this aspect.
Now Capital Auto Parts Factory has not only formulated 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 reaction, and then continued: "The third test is the seal air tightness test, the purpose is to evaluate the wheel hub The sealing effect of the bearing unit under certain pressure conditions. "
"The test conditions are that the test bearing does not rotate, the ambient temperature is 20℃±15℃, and the tightening torque is as specified in the drawing."
"At the beginning of the test, tighten the inner ring of the hub bearing unit, press the sealing ring on one side, and apply soapy water or immerse the sealing ring side in water."
"The other side is not press-fitted, and the seal is never press-fitted Apply an air pressure of 196kPa to this side of the circle and seal it for 10 minutes. There should be no air leakage on the other side. "
There are standards, data, and processes!
He Qingquan’s report is definitely meaningful.
Even before going to the test site, Chen Qi and others can roughly imagine the scene of the wheel bearing test project.
"The fourth test is a flange rotational bending fatigue test. The purpose of the test is to evaluate the fatigue life of the wheel hub bearing unit flange..."
"The fifth test is a static strength test. The purpose of the test is to evaluate the wheel hub Will the bearing unit break when it is subjected to a large load..." "The sixth test is the angular stiffness test. The purpose of the test is to evaluate the elastic displacement of the wheel hub bearing unit when the car is turning..."
"The seventh test is the load friction torque test. The purpose of the test is to evaluate the rotational flexibility of the wheel hub bearing unit during normal driving..."
"The eighth test The test is a fretting wear test. The purpose of the test is to evaluate the wear of the inner and outer raceway contact surfaces of the wheel hub bearing unit during vehicle transportation..."
The only sounds left in the conference room were the sound of He Qingquan explaining the test items and the rustling sound of the pen hitting the paper.
Everyone listened attentively, and He Qingquan also had a very strong sense of accomplishment.
The hard work and dedication of the past few months have not been in vain.
Just looking at the reactions of Chen Qi and others, we know that the results of this inspection will definitely not be bad.
Capital Automotive Accessories Factory, this time among the supporting factories of the new BJ212, will definitely make a splash.
"The ninth test, which is also our last test, is a bolt tightness test. The purpose is to evaluate the slippage and disengagement of the bolts on the wheel hub bearing unit relative to the cam."
"The test condition is that the test bearing does not rotate. , the ambient temperature requirement is 20℃±15℃..."
"The evaluation method of this test item is that the M12 bolt must not slip or break when the torque is 150N·m."
< br>"M14 bolts are required to not slip or break when the torque is 250N·m."
"M12 and M14 bolts cannot come out when a force of 4900N is loaded."
"Dear leaders and comrades, the above are the nine test standards formulated by our Capital Automotive Accessories Factory for the new generation of wheel hub bearings."
"At present, except for the durability test that has not been completed, other test results have been completed. All performance parameters have met the design requirements.”
After He Qingquan said this, he took a long breath.
When he was talking about those things, he hardly read the information. He just kept most of the test requirements in his mind.
This alone shows that he has put in a lot of effort and is clearly and truly involved in this project.
Otherwise, there would be no way to complete this explanation so fluently.
“Wow!”
Chen Qi took the lead in applauding. With his move, others naturally applauded too.
The atmosphere in the entire conference room was relaxed.
Even those participants who did not understand the test requirements could feel the power just now and everyone's admiration.
"This time our superiors asked us to speed up the prototype production of the new BJ212. I felt a lot of pressure."
"New technology, new processes, and new materials. The new model uses many 'three new parts' , I was very worried about whether these parts could be produced as required.”
“I didn’t expect that when I arrived at the Capital Automotive Accessories Factory, you gave me a huge surprise.”
< br>“Your sample preparation has exceeded our expectations.”
Chen Qi spoke on behalf of the Capital Automobile Manufacturing Plant with a smile on his face.
"Thank you, Mr. Chen, for your affirmation. In fact, Jiang Liaison's contribution is the biggest for this test standard to be improved into what it is today."
"He set up a big framework and requirements for us. We just These requirements have been implemented into specific parameters. ”
“Faced with such strict test items, the wheel hub bearings we used on the current BJ212 failed eight of the nine tests, and only the bolts were firm. The performance test meets the requirements. ”
“According to our calculations, after using this wheel hub bearing, the new BJ212 no longer needs to maintain the wheel hub bearing, and it does not need to be replaced within 200,000 kilometers. ”
“This impact alone will save our country at least 200 million yuan in the next twenty years, or even more.”
He Qingquan is a good person, and he knows that the credit that belongs to the Capital Auto Parts Factory will not go away.
Drinking water does not forget the well digger. Jiang Hui is indispensable for today's 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 to behave in the workplace.
Just like the employees of the main engine factory accompanying the leader to inspect the supplier, the supplier must find an opportunity to praise the employees of the main engine factory.
Otherwise, they might give you small shoes next time.
Party A’s right to speak cannot be ignored so easily.
“I have specially studied the design drawings of this wheel hub bearing, and it is indeed very cleverly designed.”
“Even people from FAW and Second Automobile Works have to submit to it after seeing it. "
Lu Jianqiang also stood up and expressed his optimism for the new generation of wheel bearings, which can be regarded as affirming Jiang Hui's level from the side.
After all, Jiang Hui led everyone to draw the drawing of the wheel hub bearing.
"As an important supporting factory for the new BJ212, Capital Auto Parts Factory has made such a major technological breakthrough. I feel it is necessary to report it to the First Machinery Department and promote our results nationwide as soon as possible."< br>
“Let the big brothers of FAW and Second Automobile Works see that the automobile industry in our capital will not be worse at all.”
Following Lu Jianqiang’s words, Chen Qi also further stated own attitude.
In today's Chinese automobile industry, the special status of FAW and Second Automobile Works is certainly not easy to surpass.
Not to mention other things, the administrative level alone must be at least half a level higher.
For example, Capital Automobile Manufacturing Plant is a department-level unit, but FAW and Second Automobile Works are deputy-ministerial-level units.
State-owned enterprises these days are very particular about levels, and state-owned enterprises and administrative departments can interchange at any time.
Even if the difference is only half a level, it is still a huge gap that cannot be overcome.
No wonder Chen Qi is a little worried.
With the two big bosses setting the tone, the result of this sample confirmation work at the Capital Automotive Accessories Factory was naturally very good.
This is a good start for the subsequent confirmation work of other supporting factories.
(End of this chapter)