Countercurrent 1982

Chapter 413 Quality Inspection System
"Okay." After Duan Yun took the order, he walked to the front of the car and took a look, then turned his head and said to Qin Shengli who was behind him, "Go to the workshop and ask someone to move things!"

"Hey." After Qin Shengli responded, he turned and ran to the workshop.

Looking at the sample shell on the car, Duan Yun was quite excited.

He didn't expect the diesel engine factory to produce the finished product so quickly. It can be seen from this that Yang Sheng is still very sincere in cooperating with Duan Yun.

The rest is the sample testing. There is a relevant quality inspection room in Duan Yun's factory. As long as the samples pass the test, the problem of Duan Yun's gearbox casing will be solved.

Although the Diesel Engine Factory has continued to produce military engines, there is still no problem in producing such backward-technical gearbox casings. Looking at Daxing and even Shanxi, it is estimated that there is no second manufacturer with better equipment and technology than Daxing Diesel Engine Factory.

The modern automobile industry has never been able to produce all advanced products in one company. Each has its own expertise, and the most scientific and efficient way is to work together and integrate scientifically.

Automobile gearbox is a mechanical product with high technical content. Even if Duan Yun has the knowledge reserve in his previous life, if he wants to rely on the funds and equipment of the current large group, it is absolutely impossible for him to produce a complete set of equipment parts by himself in the short term. ability, so he must find other powerful manufacturers to cooperate with.

In addition, the overall level of the domestic industry is not high at present. It is destined to be difficult to make internationally advanced auto parts equipment in a short period of time, and there is still a long way to go.

But although it is temporarily impossible to make an internationally advanced gearbox, Duan Yun is still confident that he can make the best gearbox equipment in China through technical transformation and cooperation.

According to Duan Yun's plan, he will first produce gearbox products that are competitive in the domestic market, and then continue to expand the market by taking advantage of price and channel advantages.

When Duan Yun has accumulated enough capital and technical reserves, he can continue to use technological innovation to make his factory's products more competitive in China, and keep catching up with similar foreign products in terms of quality and performance.

Time is still a bit urgent for Duan Yun. His current plan is a three-step process. The first step is to make a blockbuster product to revive the factory and improve production efficiency. The second step is to make a domestic The most competitive products to seize the share of the domestic market.

Even in today's planned economy era, there is a commodity economy. Compared with the Red Star General Factory, Duan Yun's large collective enjoys more favorable policies, has certain independent pricing power, and can have more and more flexible purchases and purchases. Sales channels.

And in [-] next year, German Volkswagen AG will become the first world-renowned auto company to enter China, and the first product they launched after entering China is the well-known Santana sedan, and this pair For Duan Yun, it is an important opportunity.

At that time, the country’s high-level officials had always advocated the localization rate of Santana cars. For this reason, they also gave very generous support policies to many domestic car manufacturers. The localization rate of the company barely reached more than 80%, which shows the huge gap between the domestic automobile technology and the world's advanced automobile production technology.

But if Duan Yun can successfully catch this train and become a domestic supplier like Santana, then even if it is only a gear supplier, the factory's annual benefit will be very high, there is no doubt about it .

However, if Duan Yun wants to produce Volkswagen's standard spare parts, it will definitely not be an easy task. Duan Yun still needs a lot of capital and technology accumulation in the early stage.

As for the last step, Duan Yun wants to look at the world and rely on his strong accumulation of capital and technology to realize his technological ambitions in his previous life. However, Duan Yun still has a long way to go to complete the third step of the plan.

"Manager Duan, I called someone over." Qin Shengli had already called seven or eight workers from the workshop.

"Pick up all the things on the car and send them to the quality inspection room. Handle them with care." Duan Yun settled down, counted the number of samples on the car, and signed his name on the receiving form. Handed over to the truck driver.

At present, there are not many quality inspection items here, only precision and surface flaw detection, and the relevant equipment is not complete.

But fortunately, the products of the large group can also be inspected at the main factory. Relatively speaking, the main factory has equipment and instruments for inspection.

Quality inspection is also a very important part of the production process. In the past, the large group mainly processed unqualified "third-product parts" from the general factory. It only needed a little turning and polishing. It really didn't need too much quality inspection equipment. But now, if Duan Yun wants to control product quality stably, he must rebuild a complete quality inspection system.

The management, rules and regulations, and nodes of various processes involved in the quality inspection of enterprises, Duan Yun has to improve and deal with this matter step by step.

The gear detection items include gear transmission accuracy; gear detection introduction; cylindrical gear single measurement, comprehensive measurement; gear overall error measurement; gear pair measurement; bevel gear, worm gear, rack measurement; , Worm gear hob, shaper cutter measurement, etc.

According to Duan Yun's understanding, there are two types of gear testing, one is analytical testing, and the other is functional testing.

Analytical testing is commonly known as single-item testing, and generally includes tooth shape and orientation, common normal and variation, radial runout, base joint deviation, weekly joint cumulative error, etc.This detection method requires special measuring tools and detection instruments, so some small processing enterprises cannot detect it (mainly for tooth shape and direction detection, a gear tester is required, and this instrument is very expensive.).

Functional testing is also called comprehensive testing. This requires a measuring instrument, which is much cheaper than a tooth shape and direction tester, and is more suitable for mass testing with low precision requirements.Use the standard gear with known precision (the general precision is around 4th grade and 5th grade) to detect the gear under test, because the precision of the standard gear is higher than that of the gear under test, so the detected deviation is regarded as the deviation of the part under test. Processing errors.

This kind of comprehensive inspection instrument is referred to as the double mesh instrument, which is used to measure the radial comprehensive error and the change of the center distance of the gear pair.For the shape of this inspection instrument.Under the action of the spring force, the measuring gear is engaged with the measured gear on both sides, and the single error such as radial runout of the ring gear and tooth profile error of the latter is comprehensively reflected as the radial variation parallel to the guide rail.The value is indicated by the dial indicator, or the error curve is recorded by the recorder.

The maximum variation in one revolution and one tooth of the tested gear is the radial comprehensive error and the radial comprehensive error of one tooth respectively; the maximum variation obtained from the paired measurement of a pair of tested gears is the change in the center distance of the gear pair.The double gear instrument has simple structure and high measurement efficiency, and is widely used in mass production to test gears with 5~6 precision.

The main factory also has this kind of equipment, but if Duan Yun wants to test more advanced gear products in the future, he needs better testing equipment.

So Duan Yun planned to arrange people to go to BJ to purchase relevant inspection equipment, even if it cost a little more money, he still wanted to buy better inspection equipment than the main factory.

(End of this chapter)