CQXZ Special Aluminum Co., Ltd. a high-quality private enterprise integrating aluminum processing, production and sales, has successfully developed two high-precision thin-walled special tubes for medium-sized civil aircraft.
On September 11, CQXZ Special Aluminum received a reply from a well-known aluminum company in Gansu on large-caliber high-precision thin-walled special aluminum alloy tubes for aircrafts entrusted to process: "… Your company's products fully meet the requirements, I The company has delivered to users. "
In the early morning of December 20, a large truck from another domestic comprehensive large-scale aluminum processing company in Gansu entered CQXZ Special Aluminum, and it commissioned an important part of the aircraft that it commissioned to process—large-size high-precision thin-walled special hard alloy Pipe products are loaded and shipped away.
It is reported that CQXZ Special Aluminum Co., Ltd. independently developed and mass-produced these two types of special pipe products using domestic equipment. It is an important aircraft structural material and can be widely used in mechanical rollers, high-precision inspection tools, and optical remote sensing. The manufacture of electronic devices and various equipment brackets has a good application prospect in the fields of lightweight industrial equipment, drones, medical equipment, heat sensitive, sports and leisure.
It is understood that in November last year, a state-owned enterprise in Gansu urgently needed a large-caliber thin-walled aluminum alloy special pipe with high accuracy requirements for an important project. A well-known aluminum company has been enthusiastically receiving orders, but has been unable to successfully produce. After learning about CQXZ Special Material Aluminum's solid technology and production capacity for many years, the person in charge of this aluminum company came to the door. In response to this request, CQXZ Special Aluminum Co., Ltd. began the trial production of this pipe. After one month of hard work, it has overcome one technical difficulty after another and finally developed three pipe samples. The customer expressed satisfaction after trial. Therefore, in January this year, the aluminum company hoped that CQXZ Special Aluminum could accept the processing and production of this batch of products. At this time, the production time for this batch of pipes is not enough. The user needs urgent goods and tight schedules. However, the eager users of CQXZ Special Aluminum Co., Ltd. are anxious for the urgent needs of the users and accepted the challenge. They resolutely signed the "hard bones." "Product processing contract.
According to the technical director of CQXZ Special Aluminum Co., Ltd., these batches of pipes have strict external dimensions, small technical tolerances, extremely high process requirements, and great processing difficulties. First, due to the ultra-thin pipe wall, the wall thickness is required to be only 2 ~ 2.3 mm. In addition, the pipe alloy state is 2A12T4, and the hardness is high, which makes it difficult to reduce the wall. Multiple complex processes are required to extrude the pipe material with a thickness of 6 mm. Reduce to required wall thickness. Secondly, because the pipe diameter is too large, the diameter requirement is 165 mm, and the outer diameter tolerance is limited to +0.8 mm. In addition, the wall thickness is too thin, resulting in large deformation of the outer diameter during the quenching process and difficult orthopedicity in the subsequent process. Third, due to the length of the pipe, the length is required to be 5 meters and 7 meters. The straightness requirements are also high. The bend per meter cannot exceed 2 mm. The pipe is severely bent after quenching, and the outer diameter is easy to deform during the straightening process. , Making it difficult to control the external dimensions.
After 4 months of repeated trial production and hard work, I encountered too many technical difficulties, scrapped too much wool, and the precise processing of each pipe was very difficult. However, it has been frequently involved in the R & D and manufacturing of "national prefix" products, and has repeatedly written the legend of the "involved army" CQXZ Special Aluminum, relying on its nearly 20 national invention patents and utility model patents, as well as its own superb technical and technological foundation, Strong technical equipment, rich production experience, and a hard-working spirit to overcome difficulties have once again captured the "hard bones" that others have failed to do.
On September 27, when another large domestic integrated aluminum processing enterprise in Gansu brought its own R & D and production task for two years but could not get it, CQXZ Special Aluminum resolutely signed the processing agreement. . These large-size high-precision thin-walled cemented carbide special pipe products are important parts and components used in a medium-sized civil aircraft project.
According to the person in charge of technology, this batch of pipes is a hard alloy, which requires a length of 5.2 meters and a bending degree of ≤1 mm / m. It is difficult to guarantee tolerances and straightness, and it is more difficult to dry than similar products produced before. The agreement also requires that the state of the alloy after processing is 2024T4, the external dimensions and allowable deviations are outer diameter φ165 ± 0.41 mm, wall thickness 2 ± 0.1 mm, external roundness ≤0.5 mm, wall thickness deviation ≤0.1 mm; the microstructure is not Overburning is allowed. The appearance of the product requires that the pipe be a cold-worked surface. Such products are a huge challenge for the company.
After receiving the task, CQXZ Special Aluminum Co., Ltd. adopted its unique drawing and other process technologies to carefully adjust the straightness of the pipe one by one. After half a year of hard work, it successfully completed this batch of medium-sized civilians with quality and quantity. The development and production tasks of large-scale and high-precision thin-walled cemented carbide pipes for aircraft projects. Not only the surface requirements of the manufactured pipes conform to national standards, especially the inner and outer surfaces are smooth and scratch-free, and other technical indicators have reached the agreement requirements.