Because my pony belongs to Merida, I pay more attention to the relevant information of Merida. After a period of understanding, I found that two key words are often mentioned in many technical articles: TFS and HFS. My bird is so badly written that I can't guess what it means. I basically think it represents two frame models of Merida, or the technology adopted.
Unfortunately, there is not much relevant information on the Internet, so I will talk about these two frameworks with my own understanding. These two kinds of borders are made of aluminum alloy, let's talk about aluminum alloy first. Aluminum alloy itself is relatively light and its strength is not as high as that of steel, but it is still good. Commonly used aluminum alloys on bicycles are 7005 aluminum and 606 1 aluminum. The strength of 7005 aluminum is higher than 606 1, but it is also heavier. In order to pursue light weight as much as possible, it is particularly important to solve the contradiction between weight and strength. Manufacturers of big brands have also invested a lot of energy in research and development, and used many unique technologies to achieve the unity of strength and light weight, such as trapezoidal tubes, such as double circular tubes. In this way, the lightweight 6000 series aluminum can achieve the strength that only 7000 series aluminum can achieve in the traditional process. For Merida, TFS and HFS are the main technologies.
HTFS framework, usually used in Merida's challenger series. The general sizes are 16 and 18. Owen rode a challenger in Tibet last time, that is, a TFS frame. TFS is the abbreviation of Hydroforming, and its English name is Techo Forming System. It adopts 3D special molding technology, which belongs to Merida's unique patented technology. In other words, it is made by imitating HFS and adopting a relatively simple process. Some pictures of TFS frames are placed under what looks like HFS frames. It's all turned around. If you can't see them, go to Baidu yourself.
The story protagonist HFS frame is really technical; Unique; Merida frame that can really compete with other brands. HFS is the abbreviation of hydraulic homing system, that is, using the special hydraulic forming technology of hydraulic homing system, Merida carved beautiful 3D lines on the aluminum alloy frame tube of 6066 prolite, and reduced the frame to an incredible degree (18 frame is about 1.4kg). At the same time, it maintains the characteristics that Merida has always insisted on: ultra-high rigidity and strength. The so-called hydroforming technology of pipe fittings is suitable for pipes with irregular hollow structures with different thicknesses. As the name implies, firstly, the pipe is put into the molding die, and the pipe is compensated by adding high-pressure fluid (mainly water at present) to the pipe and applying axial pressure, and the pipe is pressed into the mold cavity for molding. Using this technology, the tube wall of HFS frame can be made thinner, thus reducing weight and improving strength. However, due to expensive equipment and high rejection rate, the cost of HFS frames remains high. Summary: HFS top aluminum frame ~ ~ ~ Merida, owning it can only be a dream for me. Somebody buy one and let me ride it. Try it, huh?
The new ultra-light HFS hydroformed frame adopts the highest manufacturing technology of Merida aluminum alloy frame. The frame is made of high-strength lightweight hydraulic pipe, and the welded joint between the upper pipe and the head pipe is made of Merida LOGO with hydraulic pressure relief design. The upper and lower pipes in the front triangle are butterfly hydraulic oil suction pipes exclusively patented by Merida, and the rear triangle is also made of light oil suction pipe 4 and the latest Merida seat pipe clamp. The FSA has a built-in Pei Lin bowl set.
The measured frame of 1427g(26x 16 inch) is nearly 80g lighter than that of the giant 08 XTC team.
Secondly, both HFS and TFS only mention a technology, a frame manufacturing process, that is, hydroforming technology. TFS stands for Hydroforming Imitation Technology. It is not difficult to see that TFS can be said to be a simplified version of HFS, and Merida generally uses FLEXSTAY technology on its own high-end frame, a technology to flatten the rear fork to enhance the rigidity of the rear fork when it quickly turns corners.
Finally, the 300 and 500 shelves are authentic TFS, even if it is half a TFS. The only difference is that the rear fork of the 500 rack adopts FLEXSTAY technology, while the rack of the 300 rack is not increased in order to save costs.
It seems that picking 200 is a semi-tfs, that is, the main triangle is the back fork of tfs. According to the internet, the whole tfs costs only 50 yuan. Besides, frog legs are actually of little use. It is said to contribute to the rigidity and stability of the frame when turning at high speed. Anyway, I seldom turn on the highway, but 1 1 picking 300 is still very cost-effective. The whole tfs frame is also welded with frog legs.